EP2013535A1 - Kraftfahrzeugscheinwerfer - Google Patents
KraftfahrzeugscheinwerferInfo
- Publication number
- EP2013535A1 EP2013535A1 EP07723957A EP07723957A EP2013535A1 EP 2013535 A1 EP2013535 A1 EP 2013535A1 EP 07723957 A EP07723957 A EP 07723957A EP 07723957 A EP07723957 A EP 07723957A EP 2013535 A1 EP2013535 A1 EP 2013535A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- infrared radiation
- motor vehicle
- filter device
- vehicle headlight
- light source
- 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
Links
- 230000005855 radiation Effects 0.000 claims abstract description 61
- 229910052724 xenon Inorganic materials 0.000 claims description 6
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052736 halogen Inorganic materials 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 claims description 4
- 150000002367 halogens Chemical class 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 description 17
- 238000009826 distribution Methods 0.000 description 12
- 230000004297 night vision Effects 0.000 description 10
- 230000004913 activation Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 230000004313 glare Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009849 deactivation Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Classifications
-
- 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
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/04—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for filtering out infrared radiation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—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]
- F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel 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
- F21S41/17—Discharge light sources
- F21S41/172—High-intensity discharge 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
- F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
- F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
-
- 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
- F21Y2113/00—Combination of light sources
-
- 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
- F21Y2113/00—Combination of light sources
- F21Y2113/30—Combination of light sources of visible and non-visible spectrum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the invention relates to a motor vehicle headlight with a base light source.
- bi-xenon and bi-halogen headlamps which use a metal diaphragm in the beam path of the basic light source, in this case the xenon or halogen lamp, in particular the projection module of the headlamp, to detect the dark region of the low-beam light distribution above the light-dark Create border.
- the maximum illuminance levels in this area are defined by the legislator.
- the metal panel is movable and can be guided out of the beam path of the base light source in order to generate a high beam distribution with the same headlight.
- the lens of the projection module Since no radiation penetrates into the dark region of the low-beam light distribution due to the conventional metal diaphragm in the beam path of the projection module, the lens of the projection module must be designed such that it generates the (visible) scattered light for the region above the cut-off line, also in the Dark area to recognize signs, for example. As a result, the light levels in the area of the optical headlight axis are reduced and the reach of the headlight is reduced. The cold, daylight-like color of the xenon headlights can lead to psychological glare in other road users.
- the invention is based on the object to provide a motor vehicle headlight that can be used efficiently.
- the invention is therefore based on the idea of equipping a motor vehicle headlight which can be operated in at least two operating modes with a basic light source and a filter device which is substantially transparent to infrared radiation. It is then, for example, required for the operation of an active night vision system, infrared radiation at least partially generated by the base light source, which emits in addition to the visible portion and an infrared component.
- the filter device is designed and positioned such that in a first operating mode, for example a low-beam operating mode, the beams of the basic light source are partly unfiltered (at least with respect to said filter device) and partly after filtering with that for infrared radiation substantially permeable filter device are emitted by the motor vehicle headlight. In a second operating mode, for example a high-beam operating mode, the filter device is positioned such that the beams of the basic light source are emitted unfiltered (at least with regard to the aforementioned filter device) by the motor vehicle headlight.
- an infrared radiation device which may be integrated in the motor vehicle headlight, is activated to radiate enough infrared radiation for the operation of a night vision system by the motor vehicle headlight. It is thereby achieved that enough infrared radiation is radiated by the infrared radiation device and the base light source in the first mode to an active To operate night vision system with satisfactory range.
- the infrared radiation device can be operated with lower power, which also cost advantages, and space can be saved in the headlight housing.
- the infrared radiation device comprises, for example, an infrared source and / or an infrared reflector. Activation of the infrared radiation device accordingly comprises, for example, activation of the infrared source and / or irradiation of the infrared reflector with an infrared source.
- the filter device is designed such that it is transparent in the infrared spectral range for more than 40%, 50%, 60%, 70%, 80%, 90% or 95% of the radiant flux.
- the infrared radiation device is preferably deactivated in the second operating mode, for example in a high-beam operating mode, since in this operating mode the visible light generated by the basic light source and emitted by the motor vehicle headlight is sufficient to operate an active night vision system. As a result, the motor vehicle headlight can be operated energy-efficiently.
- the infrared radiation device is positioned, in particular in the first operating mode, in such a way that in the first operating mode, beams emitted by the infrared radiation device lie in the beam path of the light emitted by the base light source.
- the infrared radiation device is particularly preferably connected to the filter device permeable to infrared radiation, and / or the filter device substantially transparent to infrared radiation can be positioned such that beams radiated by the infrared radiation device in the first operating mode in the beam path of the Base light source radiated light lie.
- the infrared radiation permeable filter device carries the infrared radiation device.
- the infrared radiation substantially transparent filter device is opaque to visible light.
- the filter device is designed such that it is transparent in the visible spectral range for less than 5%, 10%, 15%, 20%, 30%, 40%, 50% or 60% of the radiant flux.
- the required light called “scattered light” can be generated in the dark region of the low-beam light distribution above the cut-off line.
- the scattered light for the dark area above the cut-off line for example, no longer needs to be generated with the lens of a projection module.
- the lens can therefore be optimized with respect to other parameters, such as the range of the motor vehicle headlight. In addition, this can mask an unwanted reddish glow of the near infrared radiation, which is otherwise visible to the human eye in the region of the filter device.
- the filter device is advantageously designed such that this small proportion in the visible spectral range, for which the filter device is permeable, comprises one or more predetermined wavelength ranges, whereby the light color of the visible light for which the filter device is permeable can be designed freely.
- the scattered light can be given any color within the legal limits.
- the scattered light is given by the filter device a warm color, in particular with a color temperature in the range of 2500 to 3500 Kelvin, which reduces the risk of so-called psychological glare other road users.
- the filter device which is substantially transparent to infrared radiation, acts as a diaphragm, in particular for visible light, in the first operating mode.
- the filter device which is substantially permeable to infrared radiation is embodied in a planar manner and, in the first operating mode, is partially positioned in the beam path of the base light source so that the surface normal of the filter device substantially corresponds to the beam direction of the motor vehicle headlight. That of the basic Light source radiated visible light hits partially - directly or indirectly (for example, after a reflection) - on acting as a shutter for visible light filter device.
- the filter device only less than 5%, 10%, 15%, 20%, 30%, 40%, 50% or 60% pass through the filter device in the visible spectral range.
- the remaining visible light striking the filter means is substantially reflected or absorbed by the filter means. Since the filter device only partially obscures or only partially covers the beam path of the base light source in the first operating mode (for example to a ratio of between 40% and 60% or 30% and 70% or 20% and 80%), this can be done in addition to Filtering device emerging visible light of the base light source in the first mode, for example, a low beam are realized whose bright-dark boundary can be defined by the edge of the aperture and / or filter device. In the second operating mode, the filter device acting as a visible light stop is not positioned, or at most insignificantly, in the beam path of the base light source.
- the motor vehicle headlight based on the basic light source generates in both modes, for example, a high beam distribution in the infrared spectral range and depending on the operating mode or aperture and / or Filter foundedsposition a low beam or high beam distribution or other light distributions in the visible spectral range.
- a low beam distribution and in the second mode produces a high beam distribution
- still in the first mode emitted by the basic light source in the infrared range radiation can be used at least approximately completely for the operation of an active night vision system.
- the filter device permeable to infrared radiation comprises an interference filter.
- the interference filter only passes radiation within one or more predetermined frequency bands. Radiation of other wavelengths, however, is particularly well reflected.
- the infrared radiation device is preferably semiconductor-based, for example based on an infrared diode or an infrared laser.
- the basic light source is embodied as a halogen lamp, as a gas discharge lamp, in particular a xenon lamp, or semiconductor-based, and is preferably prepared in such a way that it emits electromagnetic radiation predominantly or predominantly in the visible spectral range.
- a motor vehicle headlight is created, which is energy-efficient use in different modes, and also economically produced or can be integrated into a vehicle.
- Figure 1 shows a schematic sectional view of a
- a motor vehicle headlight 1 which has as base light source 2, a gas discharge lamp, in particular a xenon lamp.
- the base light source 2, the diaphragm 5 and thus also the infrared radiation device 3 are supported by a support device 4, which in the example also carries or comprises the housing, the reflector and the cover of the motor vehicle headlight.
- a support device 4 which in the example also carries or comprises the housing, the reflector and the cover of the motor vehicle headlight.
- other components such as a lens, not shown, and not shown filter means may be provided.
- the diaphragm 5 is in this case completely or partially designed as a filter device which is substantially transparent to radiation in the infrared spectral range, and which is substantially impermeable to radiation in the visible spectral range.
- the diaphragm 5 together with infrared radiation device 3 is positioned in front of the base light source 2, so that only part of the light emitted by the base Light source 2 radiated visible light emitted by the motor vehicle headlight 1, but at least approximately the entire proportion of radiated from the base light source 2 infrared radiation is emitted by the motor vehicle headlight 1.
- the rays 7, 6 shown in dashed lines include visible and infrared spectral components.
- the beams 8 shown in dotted lines essentially comprise only infrared spectral components, since the visible spectral components are reflected or absorbed by the diaphragm 5. This results in a dark area at the top with regard to the visible spectral components, a bright area at the bottom and a light-dark boundary defined by the diaphragm or the filter device.
- the infrared radiation device 3 is activated in order, by the motor vehicle headlight 1, to radiate a total of sufficient infrared radiation for the use of an active night vision system.
- the light distribution of the infrared radiation corresponds in the first mode substantially the light distribution of the visible light in the second mode ( beam light distribution).
- the aperture 5 together with infrared radiation device 3 is not positioned in front of the base light source 2 but retracted or pivoted out of the beam path of the base light source 2.
- the infrared radiation device 3 is deactivated, since the visible spectral component emitted by the base light source is radiated almost completely through the motor vehicle headlight 1, and thereby, for example, the visible spectral component is sufficient to operate an active night vision system, so that the Using an active night vision system no further infrared radiation needs to be generated.
- the filter device comprises an interference filter, which consists for example of several thin layers, between which there is the reflection of the incident light. Superposition of the reflected waves leads to interference phenomena. With suitably chosen layer thickness then light of certain wavelengths (usually a certain frequency band) is extinguished by this interference, so not transmitted through the interference filter, while light of other wavelength is passed through the interference filter. As a result, the interference filter passes only a certain frequency band.
- a filter device can be realized which is permeable to visible light in predetermined visible wavelength ranges and / or in predetermined beam directions. It can thereby be achieved that in the first operating mode (diaphragm or filter device in the beam path of the base light source) a so-called stray light, in particular in a predetermined wavelength range or in predetermined wavelength ranges, in the actually dark region or above the heel, is emitted by the motor vehicle headlight. Dark border is radiated.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006019735A DE102006019735A1 (de) | 2006-04-28 | 2006-04-28 | Kraftfahrzeugscheinwerfer |
PCT/EP2007/003016 WO2007124836A1 (de) | 2006-04-28 | 2007-04-04 | Kraftfahrzeugscheinwerfer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2013535A1 true EP2013535A1 (de) | 2009-01-14 |
EP2013535B1 EP2013535B1 (de) | 2010-06-02 |
Family
ID=38267629
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07723957A Ceased EP2013535B1 (de) | 2006-04-28 | 2007-04-04 | Kraftfahrzeugscheinwerfer |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2013535B1 (de) |
DE (2) | DE102006019735A1 (de) |
WO (1) | WO2007124836A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007010724A1 (de) * | 2007-02-26 | 2008-08-28 | Schefenacker Vision Systems Germany Gmbh | Leuchte für Fahrzeuge, insbesondere für Kraftfahrzeuge |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10027018B4 (de) * | 2000-05-31 | 2010-09-09 | Robert Bosch Gmbh | Fahrzeugscheinwerfer nach dem Projektionsprinzip und Beleuchtungseinrichtung eines Fahrzeugs mit wenigstens einem solchen Scheinwerfer |
DE10047207A1 (de) * | 2000-09-23 | 2002-04-11 | Hella Kg Hueck & Co | Scheinwerfer für Fahrzeuge |
FR2840389B1 (fr) * | 2002-06-04 | 2004-12-03 | Valeo Vision | Projecteur d'eclairage elliptique comportant une source lumineuse secondaire |
DE10254023A1 (de) * | 2002-11-20 | 2004-06-03 | Automotive Lighting Reutlingen Gmbh | Scheinwerferanordnung für Fahrzeuge sowie Vorrichtung zur Visualisierung eines Sichtfeldes in Fahrtrichtung eines Fahrzeuges |
DE10301830A1 (de) * | 2003-01-20 | 2004-07-29 | Robert Bosch Gmbh | Scheinwerfer für Fahrzeuge |
DE10355747B4 (de) * | 2003-08-28 | 2014-10-09 | Automotive Lighting Reutlingen Gmbh | Kraftfahrzeugscheinwerfer zur Erzeugung unterschiedlicher Leuchtfunktionen |
DE10347951B4 (de) * | 2003-10-15 | 2012-12-27 | Automotive Lighting Reutlingen Gmbh | Beleuchtungseinrichtung für Fahrzeuge |
-
2006
- 2006-04-28 DE DE102006019735A patent/DE102006019735A1/de not_active Withdrawn
-
2007
- 2007-04-04 WO PCT/EP2007/003016 patent/WO2007124836A1/de active Application Filing
- 2007-04-04 EP EP07723957A patent/EP2013535B1/de not_active Ceased
- 2007-04-04 DE DE502007004017T patent/DE502007004017D1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2007124836A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102006019735A1 (de) | 2007-10-31 |
EP2013535B1 (de) | 2010-06-02 |
DE502007004017D1 (de) | 2010-07-15 |
WO2007124836A1 (de) | 2007-11-08 |
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