EP2507545A1 - Module de projecteur - Google Patents

Module de projecteur

Info

Publication number
EP2507545A1
EP2507545A1 EP11719235A EP11719235A EP2507545A1 EP 2507545 A1 EP2507545 A1 EP 2507545A1 EP 11719235 A EP11719235 A EP 11719235A EP 11719235 A EP11719235 A EP 11719235A EP 2507545 A1 EP2507545 A1 EP 2507545A1
Authority
EP
European Patent Office
Prior art keywords
phosphor
module
radiation
radiation source
headlight
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP11719235A
Other languages
German (de)
English (en)
Other versions
EP2507545B2 (fr
EP2507545B1 (fr
Inventor
Thomas Reiners
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Osram GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=44201932&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2507545(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Osram GmbH filed Critical Osram GmbH
Priority to EP20130192971 priority Critical patent/EP2725293A1/fr
Priority to EP14193460.4A priority patent/EP2851611B1/fr
Publication of EP2507545A1 publication Critical patent/EP2507545A1/fr
Application granted granted Critical
Publication of EP2507545B1 publication Critical patent/EP2507545B1/fr
Publication of EP2507545B2 publication Critical patent/EP2507545B2/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
    • 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
    • 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
    • F21S41/13—Ultraviolet light; Infrared 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
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • 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
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/70—Prevention of harmful light leakage
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/06—Fastening incandescent mantles or other incandescent bodies to lamp parts; Suspension devices for incandescent mantles or other incandescent bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/42—Forced cooling
    • F21S45/43—Forced cooling using gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings

Definitions

  • the present invention relates to a headlamp module according to the preamble of patent claim 1.
  • Such a headlamp module is disclosed, for example, in WO 2010/000610 Al.
  • This document describes a lighting unit for vehicle headlights, the lighting unit has a light source light-emitting diode chips with a phosphor coating (chip Layer Coating) are provided to the generated from the LED chips and blue light into white light to kon ⁇ vertieren.
  • This lighting unit is designed as part of a vehicle headlight and can thus be regarded as a headlight module.
  • the term headlamp module referred to in this patent application a module which is intended for use in a headlight or formed as part of a headlamp. In the sense of the invention, this module can be designed as a structural unit which is used as a whole in a headlight or as a system of individual interacting components of a headlight.
  • the headlight module according to the invention is also primarily intended for use in a vehicle headlight, although other applications are possible.
  • High-quality vehicle headlights are currently producing in addition to the legally required turn-signal and high beam additional variable light distributions such as curve and cornering light based on the requirements of ECE Regulation 123.
  • adaptive remote ⁇ light will be allowed.
  • parts of the high beam are hidden in order not to dazzle the preceding traffic or oncoming traffic.
  • all current headlamp systems must be pivotable about a horizontal axis, transverse to the direction of travel, in order to ensure the reach setting of the headlamp. In very powerful headlamps, this setting must even be made automatically depending on the load condition of the vehicle. Especially with the LED headlamps used recently, this means that the entire system, including a heavy cooling system, has to be swiveled.
  • stepper motors for this purpose, mechanical systems are usually used with stepper motors to pivot the headlamp module ei ⁇ ne horizontal axis.
  • stepper motors for realizing a dynamic cornering light, it is also known to pivot the headlight ⁇ projector module about a vertical axis.
  • matrix headlights based on discharge lamps, which contain an imaging element and in which each pixel is responsible for a specific solid angle element.
  • These sham Throwers are known as Pixel or Matrix AFS (adaptive front lighting system) projectors.
  • Pixel or Matrix AFS adaptive front lighting system
  • they require a high luminance in order to keep the optical components small, and, on the other hand, a high luminous flux, which is subsequently - depending on the desired light distribution - largely faded out again, so that only a small part of the high luminous flux is actually used becomes.
  • Multi-LED floodlights only switch light where it is needed and can therefore be more efficient in principle.
  • the object of the present invention is therefore to provide a headlamp module, the one dynamic light distribution for different driving situ ⁇ ation at the lowest possible cost, high reliability and high efficiency as possible allows without going duls associated with the necessity of swinging of Scheinwerfermo-.
  • the headlight module according to the invention has at least one phosphor or a phosphor mixture which can be excited by means of electromagnetic radiation for emitting light and at least one radiation source for exciting the at least one phosphor or phosphor mixture.
  • the dummy ⁇ bowler module in addition at least one support device for the at least one fluorescent and at least one beam steering device, wherein the at least one beam steering device is arranged or formed to or from the at least one radiation ⁇ source emitted electromagnetic radiation to the at least one phosphor ., Guidance on the Leuchtstoffge ⁇ mixes.
  • the at least one beam steering device opens up the possibility of exciting the phosphor or the phosphor mixture only at the positions which correspond to a dynamic light distribution currently to be set in the field of vision of the driver, for example on the driving path .
  • the light emitted by the radiation in the form ⁇ le electromagnetic radiation by means of the beam steering device over all or only over a part of the provided with the phosphor surface of the support device is performed similarly.
  • the beam guidance takes place sufficiently fast, so that the human eye can not follow it.
  • the at least one radiation source is preferably a laser, for example, a La ⁇ serdiode or an arrangement of multiple laser diodes or one or more light emitting diodes, in particular super luminescent diodes.
  • electromagnetic radiation from the spectral range of the visible light and of the ultraviolet and infrared range can be generated in a highly efficient manner and be generated for the excitation of the phosphor or phosphor mixture .
  • an ultraviolet radiation or blue light emitting light emitting diode array and particularly preferably Laserdio ⁇ denan Aunt is used as the radiation source, and by means of the phosphor or the phosphor mixture thereof generates white light, for example, to enable a white light emitting vehicle headlights.
  • the phosphor is excited only there by the above-indicated scanning method, where it is needed. This results in a high effi ⁇ ciency.
  • An efficiency deterioration, as known from the prior art, by a downstream Modulati ⁇ on and suppression of radiation is not necessary. This contributes to the reduction of fuel consumption and CO 2 emissions of the vehicle.
  • the beam steering device for example, as a micro-mirror device (MEMS, MOEMS, DMD), can be a resolution in the range of 1000 x produce 1000 pixels and thus realize the ge ⁇ legally required adjustment of the light distribution without stepping motors.
  • MEMS micro-mirror device
  • MOEMS MOEMS
  • DMD digital light detector
  • adaptive high beam and other variable light distributions can be generated in accordance with ECE Regulation 123, without mechanically moving the entire headlight module.
  • the movement of the micromirrors is easy to realize due to their low mass.
  • any aspect ratio can be adjusted.
  • the phosphor swept area of the phosphor and the phosphor itself may be produced at low cost in any length-to-width ratio (in one piece or in pieces). This allows the special properties of a beam distribution of a headlamp be taken into account.
  • the desired light distribution can be programmed by software in any form become. This can be generated with the same headlight module highly functional headlights, but also simple light ⁇ distributions. If one uses radiation source as excitation laser, it is possible by using a smaller laser class, that is, with lower Leis ⁇ tung pickup, a light source for a frugal Elect ⁇ roauto be generated while, at higher laser powers or more exit faces, realized by lenses and reflectors very elaborate and design-driven headlights are possible.
  • the headlamp module further comprises at least one at least partially transparent optical device which is arranged in the beam path of the radiation emitted by the at least one phosphor or phosphor mixture.
  • This may preferably be an aspherical lens and / or a free-form lens. This makes it possible to realize an enlargement or a projection of the intermediate image on the phosphor into infinity - for automobile headlamps this is typically the case from a distance of more than 25 m.
  • free-form lenses a deliberate distortion can be achieved, for example, egg ⁇ ne stretching of the light distribution to be generated in peripheral portions. As a result, the phosphor surface can be kept small and still achieve an extension of the light distribution to larger areas.
  • the at least one carrier device is designed to be transparent and applied to an optical filter device which is designed to at least partially reflect radiation emitted by the at least one phosphor.
  • the at least one beam steering device is arranged such that radiation emitted by the at least one excitation radiation source passes through the optical filter device and the carrier device before it impinges on the phosphor.
  • This embodiment offers ⁇ passed radiation is incident from the excitation radiation source to the phosphor at a small angle, thereby creating extremely low distortion. The measures for distortion corrections are therefore very small.
  • the space between the phosphor and the optionally provided, at least partially transpa ⁇ pensions optical device can be kept free of further elements.
  • At least one carrier device is designed to be reflective for radiation emitted by the at least one phosphor and / or for radiation emitted by the at least one excitation radiation source.
  • the at least one beam steering device is preferably arranged such that on the side remote from the carrier device of the phosphor side of the phosphor is true of the at least one source of excitation radiation emitted radiation on ⁇ .
  • Such variation results in Sonder be ⁇ low depth.
  • the at least one support device is thermally connected to a cooling device, wherein the cooling device is a heat sink.
  • the cooling device is a heat sink.
  • the heat sink, the at least one support device represent. If the heat sink reflective keptbil ⁇ det, for example by a coating with Alumini ⁇ to, aluminum or titanium oxide, the phosphor can be particularly cost-applied directly to the heat sink.
  • the at least one fluorescent or Leuchtge ⁇ mixing provided surface of the support device can be formed at least partially planar or curved.
  • a higher image sharpness can be achieved, as can be achieved by an optionally provided curvature of the surface of the at least one phosphor that almost all areas of the phosphor in the focus of optionally provided ⁇ the at least partially transparent optical device are. This can be achieved by appropriate design of the surface of the phosphor or by the formation of the carrier device.
  • the headlight module preferably comprises at least one beam splitter device, which is arranged between the at least one excitation radiation source and the at least one beam steering device.
  • This opens up the possibility of optimally illuminating a plurality of phosphor areas, which may be spatially separated from one another, by means of a beam steering device.
  • a separate optical device can be provided for each of the phosphor areas, so that the light leaving the headlight module is composed of the light of a plurality of superimposed individual light distributions.
  • a plurality of phosphor areas are provided with different phosphors, the phosphors are selected so that they produce un ⁇ ter Kunststoffliche secondary colors. Preferably, the latter are chosen so that they give white in a subsequent superposition.
  • the at least one beam steering device may comprise a micromirror device.
  • Micromirror device preferably comprises at least one micromirror pivotable about two axes.
  • the headlight module preferably further comprises a control device for the at least one amongsstrah- radiation source or, respectively, and for the at least one beam steering device ⁇ .
  • the control device is preferably designed Minim ⁇ least to drive a micromirror of the micromirror array such that this predeterminable spatial positions and orientations occupies, wherein the controller is further configured, the radiation source in depen ⁇ dependence of the position or orientation of the turn at least one micromirror on or off ,
  • the control device may be configured such that the radiation emitted by the radiation source elekt ⁇ romagnetician radiation least one Mik ⁇ rospiegels is performed line by line or column by column over which is provided with phosphor surface of the carrier device by means of the.
  • a micromirror over the entire provided with phosphor surface of the support device and the radiation source upon reaching certain positions, or positions of the micromirror is turned off or turned ⁇ turns the radiation emitted by the radiation source elekt ⁇ romagnetician radiation by means of, in order only to excite a section of the area provided with luminescent material ⁇ and thus to produce a desired light distribution.
  • the radiation emitted by the radiation source electromagnetic radiation can by means of the at least one micromirror are guided only over part of the with fluorescent ver ⁇ designated surface of the support device, wherein the radiation source switched on continuously in this case remains to also only a part of with fluorescent provided area and produce a desired light distribution.
  • the ability to modulate the excitation is utilized supply radiation source, which can be achieved a high efficiency because light has to be unnecessarily destroyed ⁇ tet or hidden.
  • radiation of the excitation radiation source is longer available for the solid angle in which a light emission is desired.
  • the excitation radiation source can be dimensioned smaller, which is also reflected in an increase in efficiency and in a reduction in the cost of implementation.
  • a more homogeneous use of the excitation radiation ⁇ source is achieved.
  • the optical device may comprise at least one reflection ⁇ device, which is arranged such that at least ⁇ of the at least one phosphor emitted radiation impinges on the at least one reflection device.
  • Reflection devices offer the advantage that the orientation of the phosphor in the direction of travel of the motor vehicle can be up, down or sideways, which allows a greater degree of freedom in the realization of a headlight module according to the invention.
  • different length-width ratios of the exit surface can be realized, whereby the design of a headlamp with a he ⁇ inventive headlamp module can be easily adapted to specifications of end customers.
  • FIG. 1 is a schematic representation of a first embodiment of a headlamp module according to the invention
  • FIG. 2 shows a schematic representation of a second embodiment of a headlight module according to the invention
  • 3 shows a schematic representation of a third embodiment of a headlight module according to the invention
  • Figure 4 is a detailed illustration of a ⁇ execution of the present invention with a curved phosphor sheet and an optical device.
  • Figure 5 is a detailed illustration of a ⁇ execution of the present invention with a plan phosphor sheet and a reflection device.
  • FIG. 6 shows a CIE standard color chart for determining the excitation radiation sources and phosphors to be used in a headlight module according to the invention.
  • FIG. 1 shows a schematic representation of a first exemplary embodiment of a headlight module 10 according to the invention.
  • This comprises at least one radiation source 12, which is preferably designed as a blue light-emitting laser, in particular as a blue light-emitting laser diode.
  • Radiation of the excitation radiation source 12 strikes a beam steering device 14, which is preferably designed as a micromirror device.
  • the radiation emitted by the beam steering device 14 first passes through an optical filter device 16, then a support device 18 for the at least one phosphor and finally the at least one phosphor 20.
  • the support device 18 is preferably ⁇ way of highly thermally conductive material.
  • the optical filter apparatus 16 is configured such that it can pass radiation of the radiation source 12 while reflectors ⁇ advantage emitted from the phosphor 20 radiation.
  • the beam steering device 14 is designed to deflect the radiation emitted by the radiation source 12 in such a way that different regions of the phosphor 20 are excited in chronological succession.
  • the support device 18 is preferably made of ceramic, in ⁇ example of polycrystalline alumina ceramic (PCA) or sapphire.
  • the phosphor 20 may be composed of several different? ⁇ chen phosphor components, which the electromagnetic radiation from the radiation source 12 into light of different wavelength or color konvertie ⁇ ren. Further, it may be in the phosphor 20 may also be a phosphor mixture.
  • the phosphor 20 Since goes lost in the phosphor 20 about 20% of the energy of the Stokes shift and is converted into heat, the phosphor 20 is cooled by means of a cooling device ⁇ 22nd This can be for example a blower.
  • the embodiment of a headlight module according to the invention shown in FIG. 1 is characterized in that the radiation of the radiation source 12 strikes the phosphor 20 at a small angle of incidence, whereby the spot size, that is, the beam diameter of light incident on the phosphor 20 beam kept small and optimum excitation of the phosphor ge ⁇ is ensured.
  • Typical spot sizes are 0.1 mm to 0.2 mm to ensure the necessary resolution for producing different light distributions.
  • the phosphor 20 and the radiation source 12 are matched to each other ⁇ that the output from the headlight module 10 white light with a color temperature in the loading range from 3000-6500 Kelvin.
  • the embodiment of a headlight module 10 according to the invention shown schematically in FIG. 2 is characterized by a significantly smaller installation depth than the embodiment shown in FIG.
  • the combination of radiation source 12 and beam steering ⁇ device 14 is mounted so that it impinges on a side facing away from the carrier device 18 side of the phosphor 20th
  • the carrier device 18 is designed to reflect radiation emitted by the at least one phosphor 20 or radiation emitted by the at least one excitation radiation source 12.
  • the support device 18 may also be designed as a heat sink itself.
  • the embodiment shown in Fig. 2 is characterized by extremely low manufacturing costs. Also marked is the cut-off line HDG. (also in Fig. 1)
  • each phosphor is assigned an optical device 24a, 24b, 24c and which is separated from the optical system.
  • Table 24a, 24b, 24c emitted light is superimposed on an overall image 26.
  • the radiation source 12 can be followed by an optical device 28, for example a lens.
  • the radiation leaving the lens 28 is fed by means of two beam splitter devices 30a, 30b three beam steering devices 14a, 14b and 14c.
  • FIG. 3 shows that the phosphors 20a, 20b, 20c are operated only by the beam steering device or the micromirror 14a. But it is also possible that the phosphors 20a, 20b, 20c are each operated by a beam steering device or a micromirror 14a, 14b, 14c.
  • the surface provided with the phosphor 20b is curved, while the phosphors 20a, 20c are arranged on planar surfaces.
  • a cooling device 32 is used to cool the radiation source 12.
  • a control device 34 is shown, which serves to control the at least one radiation source 12 and the beam steering devices 14a to 14c.
  • the beam steering devices 14a to 14c can be formed as two axes schwenkba ⁇ re particular micromirror.
  • the control device 34 allows a control of the Strahllenkungsvorrich- obligations 14a to 14c and the radiation source 12 in a fixed grid, for example, a light distribution of the headlamp in solid angle ranges of horizontal plus / minus 50 ° and vertically minus 15 ° / + 10 ° to Errei ⁇ chen , It also makes it possible to turn off the radiation source 12 when passing over the angle ranges, in which no light is currently needed, in the short term.
  • Such a control is easy to realize because the horizontal / vertical deflection of a derarti ⁇ gene control device 34, which serves for horizontal and vertical deflection of the micromirror, thereby the light beam originating from the radiation source 12 line by line or in columns over the phosphor 20 to lead , always works with the same frequencies and the resonance frequency of the beam steering device 14 can be easily adjusted.
  • the typical light distribution always only fills a smaller solid angle, with such an arrangement "duty cycle" is given away, that is, the radiation source 12 is switched off at many positions of the micromirror or the beam steering device 14 and the phosphor 20 has to be switched off during the Duty cycle of the radiation source 12 are charged high, in order to ge ⁇ nerieren the necessary amount of light.
  • An improved control adjusts the angle preparation ⁇ surface for the horizontal and vertical deflection of the Mic roapts or the beam steering device 14 to the currently desired light distribution. For example, be ⁇ it compels the passing beam only a few lines above ⁇ half of the bright-dark boundary HDG of the asymmetry of the bundle. In this case, a correspondingly smaller angle range is sufficient for the line-by-line guidance of the micromirror or the beam steering device. As a result, the radiation source 12 can remain longer in the Ab ⁇ glare-solid angle in a scanning cycle. For cornering light less columns are needed, that is, the radiation source 12 is longer available for the core light distribution. Here, then, a correspondingly smaller angular Area for the column-wise guidance of the micromirror or the beam steering device 14th
  • Fig. 4 shows in greater detail a combination of the phosphor 20, and optical device 24 of a headlight module according to the invention 10.
  • ⁇ way is formed the phosphor surface planar. This may be achieved by appropriate formation of the phosphor surface itself or by appropriate formation of the support device 18.
  • the optical device 24 may be an aspherical lens to achieve magnification and thereby project the intermediate image on the phosphor 20 to infinity.
  • the focal plane of such aspherical lenses ie the plane from which is sharply imaged, is not plan, but typically a curved surface. Therefore, it is particularly preferred to form the surface of the phosphor 20, or the Stromervorrich ⁇ device 18 for the phosphor 20, preferably as a sphere or generalized as a conic.
  • the optical device 24 may also be a freeform lens to intentionally distort the image. This makes it possible, for example, to extend the light To generate distribution in peripheral areas, so as to keep the actual phosphor matrix, that is to be set by the control device 34 lines and columns on the phosphor 20, small, but still to allow an extension of the light distribution to larger areas.
  • Fig. 5 shows a schematic representation of an embodiment in which the optical device 24 is formed as a reflection device.
  • the reflection device can be parabolic in shape and then fulfills a similar purpose as an aspherical lens, ie rays emanating from a point are imaged infinitely, ie made parallel. Since the phosphor 20 radiates only into a half-space, a quarter-reflector shell is required at most.
  • Free-form reflectors can, in turn, deliberately distort the light distribution, that is, one can work with different magnification and distortion factors in the different regions of the reflection device .
  • Reflection devices also have the advantage that the phosphor can be in the direction of the top, bottom or side mounted 20, resulting in a greater degree of freedom in the design of a populated with a ⁇ OF INVENTION to the invention headlight module 10 system can rich ER.
  • different County ⁇ gen-width ratios of the exit surface can be realized, resulting in a considerable freedom of choice for the De ⁇ sign of a vehicle equipped with an inventive headlamp module 10 headlamp can be achieved.
  • FIG. 6 shows a CIE standard color chart in which combinations of excitation radiation sources 12 and phosphors 20, as can be set for a headlight module according to the invention, are shown by way of example.
  • Curve 36 represents the spectral color train.
  • Curve 38 encloses a field which according to the ECE regulations is considered white.
  • the white point 40 is drawn in.
  • the curve 42 gives the Planck curve like ⁇ .
  • An application of a headlamp module 10 according to the invention in a vehicle headlamp requires white light, where "white” is determined by the ECE regulations and the CIE standard
  • the color locus is in the vicinity of the white point 40 (about 5500 K or even up to 6500 K) ) Sex sets to produce daily similar colors of light.
  • the phosphor 20 Depending on the pump wavelength of the radiation source 12 ver ⁇ applied laser, which may be 400-480 nm, the phosphor 20 therefore has its center of gravity 570 to 590 nm have thereby generating 590th nm rather warm white light and 570 nm with a pump wavelength around the 410 nm cool white light.
  • the connecting line passes through the white field 38 and the color locus can be placed there ⁇
  • the most efficient solution is a phosphor at 570 nm, since it is at the maximum of V ( ⁇ ) and can be achieved with a laser pump wavelength of 405 nm n.
  • Phosphors 20 are used as they are already used today for light emitting diodes for generating white light.
  • the luminous Fabric 20 to yttrium aluminum garnet doped with cerium (YAG: Ce) or related grenade dopants in ⁇ under different appreciable concentrations.
  • YAG: Ce cerium
  • Various embodiments of such phosphors 20 can be found in EP 1 471 775.
  • Further typical phosphors are calinsine, SCAP phosphors, nitridosilicates and chlorosilicates, oxynitrides and silicates, in particular orthosilicates, as they are already known per se and used for the mixture for the production of white light.
  • Typical examples are in the Disclosure ⁇ regulations DE 10 2006 036577, DE 201 15 914 Ul, US 2003/146690, WO 2001/040403, WO 2004/030109, DE 10 2007 060 199, DE 103 19 091 and DE 10 2005 017 510 discloses.
  • the light colors can be adjusted to warm white, cool white and daylight-like white, and in particular can be produced with these phosphors and white light with a desired color temperature in the range of 3000 Kelvin to 6500 Kelvin. Examples of this can be found in DE 10 2004 038 199, WO 00/33389 and EP 1 878 063.
  • a radiation source 12 for exciting the phosphor mixture 20 in this case a laser or a laser diode is used which emits ultraviolet radiation or blue light.
  • bowler module in an inventive apparent 10 as the radiation source 12 in place of the blue-emitting laser light ⁇ en also a UV- Radiation source can be used.
  • at least two different phosphors are required for the white light generation , whose color loci are diametrically opposite the white point 40. This results in an increased color quality, since the spectrum of the light kon ⁇ can be trolled independently of the pump wavelength of the excitation radiation source 12th
  • the light emitted by the headlight module 10 is preferably composed of two color components, in particular of the radiation of the radiation source 12 and the radiation emitted by one or more phosphors.
  • the wavelength of the emitted light can be controlled very well, whereby the color control is much easier than today's white LEDs.
  • the color quality ie the color rendering index
  • the entire color space spanned by the phosphors can be represented by different modulation of the different colors.
  • control device 34 for example, by connection to a bus system of the motor vehicle, which is coupled with inclination sensors of the motor vehicle, bezie ⁇ tion by a manual input in the control panel of the driver, by appropriate control of the beam steering device 14 in a headlamp module according to the invention 10 an effect can be achieved, which corresponds to a tilt.
  • the control device 34 is also designed to set the range setting to a predetermined value if the communication with the motor vehicle fails. While the Ansteue- is preferably simultaneously tion of the beam steering apparatus provided 14 by a permanently stored light distribution on normal low beam to ⁇ to protect the phosphor 20th
  • the radiation source 12 fails or malfunctions or operates at low power, it is intended to signal the driver that there is a fault, typically through a corresponding warning light on the dashboard. Thus, the driver is advised of the inserted ⁇ restricted functionality and the necessary visit a workshop. If the beam steering device 14 fails, a warning signal is also generated to the driver and the radiation source 12 is switched off. Finally, pre ⁇ see to deactivate the radiation source 12 if the vehicle is for maintenance in a workshop and the headlight module must be opened 10th As a result, the maintenance personnel is reliably protected. Likewise, a safety device can be provided which shuts off the radiation source 12 in the case of an open headlamp housing or in the event of an accident, in particular when the headlamp housing has burst.
  • the power of the excitation radiation source 12 is preferably between 5 and 20 W.

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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)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

La présente invention concerne un module de projecteur (10) comportant au moins une substance fluorescente (20), le module de projecteur (10) comportant en outre au moins un dispositif de support (18) pour la ou les substances fluorescentes (20); au moins une source de rayonnement d'excitation (12); et au moins un dispositif d'orientation du rayonnement (14), agencé de telle sorte qu'il oriente sur la ou les substances fluorescentes (20) le rayonnement émis par la ou les sources de rayonnement d'excitation (12).
EP11719235.1A 2010-05-12 2011-05-06 Module d'un phare de véhicule Not-in-force EP2507545B2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20130192971 EP2725293A1 (fr) 2010-05-12 2011-05-06 Module de phare
EP14193460.4A EP2851611B1 (fr) 2010-05-12 2011-05-06 Module de phare

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010028949 DE102010028949A1 (de) 2010-05-12 2010-05-12 Scheinwerfermodul
PCT/EP2011/057314 WO2011141377A1 (fr) 2010-05-12 2011-05-06 Module de projecteur

Related Child Applications (4)

Application Number Title Priority Date Filing Date
EP20130192971 Division-Into EP2725293A1 (fr) 2010-05-12 2011-05-06 Module de phare
EP20130192971 Division EP2725293A1 (fr) 2010-05-12 2011-05-06 Module de phare
EP14193460.4A Division-Into EP2851611B1 (fr) 2010-05-12 2011-05-06 Module de phare
EP14193460.4A Division EP2851611B1 (fr) 2010-05-12 2011-05-06 Module de phare

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EP2507545A1 true EP2507545A1 (fr) 2012-10-10
EP2507545B1 EP2507545B1 (fr) 2015-02-25
EP2507545B2 EP2507545B2 (fr) 2020-11-18

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EP11719235.1A Not-in-force EP2507545B2 (fr) 2010-05-12 2011-05-06 Module d'un phare de véhicule
EP20130192971 Withdrawn EP2725293A1 (fr) 2010-05-12 2011-05-06 Module de phare
EP14193460.4A Not-in-force EP2851611B1 (fr) 2010-05-12 2011-05-06 Module de phare

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EP20130192971 Withdrawn EP2725293A1 (fr) 2010-05-12 2011-05-06 Module de phare
EP14193460.4A Not-in-force EP2851611B1 (fr) 2010-05-12 2011-05-06 Module de phare

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US (2) US20130058114A1 (fr)
EP (3) EP2507545B2 (fr)
JP (2) JP2013526759A (fr)
KR (1) KR101805049B1 (fr)
CN (2) CN104848134B (fr)
DE (1) DE102010028949A1 (fr)
WO (1) WO2011141377A1 (fr)

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US9702519B2 (en) 2017-07-11
JP2013526759A (ja) 2013-06-24
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EP2851611A2 (fr) 2015-03-25
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WO2011141377A1 (fr) 2011-11-17
KR101805049B1 (ko) 2017-12-05
EP2851611A3 (fr) 2015-04-08
JP2015043346A (ja) 2015-03-05
US20130058114A1 (en) 2013-03-07
EP2851611B1 (fr) 2018-11-21
EP2507545B1 (fr) 2015-02-25
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