EP2210037A1 - Scheinwerfer für fahrzeuge - Google Patents
Scheinwerfer für fahrzeugeInfo
- Publication number
- EP2210037A1 EP2210037A1 EP08846538A EP08846538A EP2210037A1 EP 2210037 A1 EP2210037 A1 EP 2210037A1 EP 08846538 A EP08846538 A EP 08846538A EP 08846538 A EP08846538 A EP 08846538A EP 2210037 A1 EP2210037 A1 EP 2210037A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- optical unit
- led
- headlight according
- module
- 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
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
- F21S41/60—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
- F21S41/10—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
- 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 headlight for vehicles with a light module comprising a plurality of LED light sources and an optical unit associated with the LED light sources, with a sensor device for detecting an object located in the vehicle front, with a control device which is provided in response to one of the sensor device Sensor signal and / or a switching signal of a switching device, the light module drives to the radiation of a predetermined light beam.
- a headlamp for vehicles which has at least two groups of LED light sources for generating a predetermined light distribution, which are summarized in a matrix-like manner on a substrate to an LED field.
- the LED fields are each preceded by an optical unit which has such an imaging characteristic that light bundles of different solid angles are radiated, which generate a predefined light distribution by superposition.
- the known headlight thus has a light module with a plurality of LED fields and optical units, so that the light module is relatively complex.
- a headlamp for vehicles with a light module which has a plurality of LED light sources, which are combined on a substrate to form an LED field. Furthermore, the headlight has a sensor device by means of which objects in the vehicle apron can be detected. The sensor device is interconnected with a control device which activates individual LED light sources of the LED field as a function of the sensor signal such that a light beam emitted by the light module has recessed areas where an oncoming traffic participant or preceding road user would be dazzled.
- the known headlamp thus enables the generation of a light distribution, which illuminates a large part of the vehicle apron with the exception of the recess area.
- Object of the present invention is to develop a headlamp for vehicles such that in a simple way improved illumination of the vehicle apron is ensured without glare occurs located in the vehicle apron road users.
- the invention in connection with the preamble of claim 1, characterized in that the light module comprises a first cell containing at least one LED light source, such that in cooperation with the optical unit, a first wide light beam for generating a motorway light distribution is generated and in that the light module has at least one second cell containing at least one LED light source such that, in cooperation with the same optical unit, at least one further wide light bundle can be generated, which adjoins directly above the first broad light bundle.
- the particular advantage of the invention is that a light module is created in a simple manner, which illuminates an enlarged vehicle apron space in addition to a base light distribution generated by a further light module. Because a plurality of cells are provided, to which a common optical unit is assigned in such a way that at least two broad light beams can be generated, a light-dark boundary of the light distribution can be displaced variably in the vertical direction, depending on the current traffic situation. A first cell of the light module is used to generate a motorway light distribution, which is superimposed on a basic light distribution.
- the at least two cells of the light module and the optical unit are designed such that at least two wide light beams are emitted, each of which hit the vehicle apron at a horizontal critical angle of at least 8 ° and at a maximum vertical angle of 1 ° ,
- this relatively wide light spots can be generated on a screen, so that by connecting the superimposed arranged wide light spots, the range of illumination can be increased.
- the optical unit is designed in such a way that the wide light beams emitted at different vertical angles are emitted with overlap of adjacent broad light beams.
- this results in a continuous transition when "switching on” or “switching off” of cells of the light module, while the bright-dark boundary has a relatively high luminance gradients.
- At least the first cell of the light module can be controlled in a dimmable manner so that relatively "soft" transitions are created between the lowermost wide light bundle and an upper edge of the basic light distribution or between the broad light bundles only at the cut-off line there is a relatively high luminance gradient.
- each cell of the light module has only a single LED chip.
- the upstream optical unit is designed such that a "widening" in the horizontal direction of the emitted light beam from the respective LED chip and thus a relatively wide light spots on the screen is generated.
- the cell may also be formed by a series of LED light sources, the number of rows of LED light sources corresponding to the number of wide light bundles.
- the optical unit in this case forms the individual LED light sources, so that pixel-like light sources are arranged in a plurality of horizontal rows on a measuring screen.
- Fig. 1 is a block diagram of a headlamp
- Fig. 2 is a schematic representation of a light distribution of the headlamp on a screen.
- a headlight for vehicles essentially consists of a housing 1, in which at least a first light module 2 and a second light module 3 are arranged.
- the first light module 2 consists of three cells A, B, C of light sources, each cell A, B, C having a single LED chip 4.
- the LED chip 4 may have, for example, a single LED or, for example, four common potted LEDs.
- the LED chips 4 of the cells A, B, C are arranged on a common substrate 5.
- the cells A, B, C are preceded by a common optical unit 6, which in each case scatters the light generated by the cells A, B, C into narrow, horizontally extending light bundles a, b and c.
- the light generated by the o- bere cell A is scattered into a first wide light beam a to form a lower wide light spot 7, which impinges on a measuring screen 18 at an angle of -0.28 ° below the horizontal H.
- the light generated by the middle cell B is scattered by means of the optical unit 6 such that a second broad light beam b is generated to form a middle wide light spot 8, which is arranged on the measuring screen 18 at least partially overlapping above the first broad light beam a.
- a generated by the lower cell C light is using the optical unit 6 is scattered such that another wide light beam c is imaged to form an upper wide light spot 9 on the screen.
- the second light module 3 has, as a light source, an LED chip 11 to which a second optical unit 10 is assigned to form a basic light distribution 12.
- the LED chip 11 to which a second optical unit 10 is assigned to form a basic light distribution 12.
- a low-beam light distribution is formed with a light-dark boundary HDG having a 15 ° rise 13.
- the cells A, B, C can be switched on or off in succession.
- the cells A, B, C are controlled by means of a control device 14 which is coupled on the input side to a sensor device 15 and to a switching device 16 on the input side.
- the sensor device 15, which is preferably arranged outside the housing 1, is designed such that objects located in the vehicle apron can be detected. For example, preceding or oncoming traffic participants can be detected and located.
- the switching device 16 may be arranged, for example, in the cockpit of the vehicle, so that manually or in dependence on predetermined parameters, an input, shutdown of cells A, B, C is made possible.
- the narrow light bundles a, b, c have a horizontal critical angle ⁇ of at least 8 ° and a vertical critical angle ⁇ of at most 1 °.
- Horizontal limiting angle ⁇ is understood to be the opening angle of the corresponding light bundle in the horizontal direction and the vertical limit angle ⁇ the opening angle of the corresponding light bundle in the vertical direction.
- the horizontal critical angle ⁇ of the light bundles a, b, c is 10 °
- the formed wide light spots 7, 8, 9 are arranged symmetrically to a vertical V.
- the vertical limit angle ⁇ of the light bundles a, b, c is about 0.3 °, so that the lower light bundle a for generating a motorway light Distribution serves.
- the lower light spot 7 generated by the lower light bundle a extends under overlap to a horizontal light-dark boundary HDG of the low-beam light distribution 12.
- the motorway light can be achieved, for example, by dimming the cell A in a dimmed manner, so that a homogenous expansion of the driving can be carried out.
- the other cells B and C can be switched on or off. This connection or disconnection can also be made dimmable.
- a "cross-fading" of an upper edge region 17 of the basic light distribution can take place which adaptively adapts the bright-dark boundary HDG of the resulting light distribution to the current traffic situation.
- the LED chips 11 of the cells A, B, C and the optical unit 6 are formed such that upon activation of the cells A, B, C, an overlap of adjacent wide light spots 7, 8, 9 occurs.
- the wide light spots 7, 8, 9 have the same contour, so that the broad light bundles a, b, c have the same horizontal critical angle ⁇ and vertical critical angle ⁇ .
- these can each also be formed by a series of LED chips 4, wherein the optical unit 6 images the light emitted by the respective rows of LED chips 4 to pixel-like light spots, which in one horizontal row are arranged.
- This row of light spots corresponds in each case to the wide light spots 7, 8, 9 when the cells A, B, C are executed with the respective single LED chips 4.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (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 |
|---|---|---|---|
| DE102007052746A DE102007052746A1 (de) | 2007-11-06 | 2007-11-06 | Scheinwerfer für Fahrzeuge |
| PCT/EP2008/064980 WO2009059990A1 (de) | 2007-11-06 | 2008-11-05 | Scheinwerfer für fahrzeuge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2210037A1 true EP2210037A1 (de) | 2010-07-28 |
| EP2210037B1 EP2210037B1 (de) | 2020-04-01 |
Family
ID=40299306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08846538.0A Active EP2210037B1 (de) | 2007-11-06 | 2008-11-05 | Scheinwerfer für fahrzeuge |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2210037B1 (de) |
| DE (1) | DE102007052746A1 (de) |
| WO (1) | WO2009059990A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3006422B1 (fr) * | 2013-05-30 | 2017-08-11 | Valeo Vision | Module d'eclairage pour projecteur de vehicule automobile, et projecteur comportant de tels modules |
| FR3021092B1 (fr) * | 2014-05-13 | 2019-04-26 | Valeo Vision | Systeme d'eclairage pour projecteur de vehicule automobile comprenant plusieurs modules d'eclairage |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6144158A (en) * | 1996-11-07 | 2000-11-07 | Sensci Corporation | Adaptive/anti-blinding headlights |
| DE10129743C2 (de) * | 2001-06-20 | 2003-05-08 | Daimler Chrysler Ag | Fahrzeugscheinwerfer, mit einer Anzahl von elektronischen Leuchtelementen als Lichtquelle |
| DE10153031C2 (de) * | 2001-10-26 | 2003-10-23 | Audi Ag | Fahrzeugscheinwerfer mit individuell und/oder gruppenweise ansteuerbaren elektrooptischen Elementen |
| DE10242864A1 (de) * | 2002-09-14 | 2004-03-25 | Adam Opel Ag | Automatische Scheinwerfer-Regeleinrichtung für ein Kraftfahrzeug mit mindestens einem mindestens eine Lichtquelle aufweisenden Scheinwerfer |
| DE10261183B3 (de) * | 2002-12-20 | 2004-06-03 | Daimlerchrysler Ag | Fahrzeugscheinwerfer mit mehreren zu einem Array zusammengefassten LEDs. |
| US20040263346A1 (en) * | 2003-06-27 | 2004-12-30 | Guide Corporation, A Delaware Corporation | Solid state adaptive forward lighting system |
| DE102004042092B4 (de) | 2004-08-30 | 2020-01-02 | HELLA GmbH & Co. KGaA | Verfahren zur Ansteuerung einer Lichterzeugungseinrichtung für Kraftfahrzeuge sowie Vorrichtung |
| DE102005041234A1 (de) | 2005-08-31 | 2007-03-01 | Hella Kgaa Hueck & Co. | Scheinwerfer für Fahrzeuge |
| FR2894905B1 (fr) * | 2005-10-25 | 2009-07-10 | Valeo Vision Sa | Procede d'eclairage module d'une route et projecteur de vehicule mettant en oeuvre ce procede. |
-
2007
- 2007-11-06 DE DE102007052746A patent/DE102007052746A1/de not_active Withdrawn
-
2008
- 2008-11-05 EP EP08846538.0A patent/EP2210037B1/de active Active
- 2008-11-05 WO PCT/EP2008/064980 patent/WO2009059990A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009059990A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102007052746A1 (de) | 2009-05-07 |
| WO2009059990A1 (de) | 2009-05-14 |
| EP2210037B1 (de) | 2020-04-01 |
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