WO1999019664A1 - Scheinwerfer für fahrzeuge - Google Patents
Scheinwerfer für fahrzeuge Download PDFInfo
- Publication number
- WO1999019664A1 WO1999019664A1 PCT/DE1998/001820 DE9801820W WO9919664A1 WO 1999019664 A1 WO1999019664 A1 WO 1999019664A1 DE 9801820 W DE9801820 W DE 9801820W WO 9919664 A1 WO9919664 A1 WO 9919664A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- reflector
- reflected
- diaphragm
- light source
- Prior art date
Links
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
- F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
-
- 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
- F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
- F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/323—Optical layout thereof the reflector having two perpendicular cross sections having regular geometrical curves of a distinct nature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
- F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
- F21S41/335—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with continuity at the junction between adjacent areas
Definitions
- the invention relates to a headlamp for vehicles according to the preamble of claim 1.
- Such a headlight is known from DE 31 39 943 AI.
- This headlamp has a light source and a reflector which has a sector which is designed such that light emitted by the light source is reflected as a light beam converging in horizontal planes and at least approximately parallel in vertical planes.
- the reflector In order to achieve a sufficient light yield, the reflector must be of a sufficient size and has a relatively large cross-section on its front edge pointing in the light exit direction. For reasons of the best possible aerodynamics and for design reasons, headlights with the smallest possible light exit openings are desired by the vehicle manufacturers.
- headlights constructed according to the projection principle are usually provided, in which a reflector reflects a converging light beam that passes a diaphragm that generates a light-dark boundary and passes through a lens.
- a reflector reflects a converging light beam that passes a diaphragm that generates a light-dark boundary and passes through a lens.
- these headlights require an increased manufacturing effort because of the lens and the aperture.
- the headlamp according to the invention with the features according to claim 1 has the advantage that it has a simple structure and can be carried out with a small light exit opening, but a sufficient light yield can still be achieved because light is reflected by the reflector in such a way that it is reflected by the aperture of the aperture can pass through.
- FIG. 1 shows a headlight in a horizontal longitudinal section
- FIG. 2 shows the headlight in a front view.
- Vehicles in particular motor vehicles, are used, for example, as fog lamps, through which a light beam with strong horizontal scatter and a continuous, at least approximately horizontal upper light-dark boundary is emitted during its operation.
- the headlight has a concavely curved reflector 10, in the top of which a light source 12 is inserted.
- the light source 12 can be an incandescent lamp, a gas discharge lamp or another suitable lamp.
- the luminous element 14 of the light source 12, that is to say its filament or Arc, is preferably arranged at least approximately along the optical axis 11 of the reflector 10 in the installed position of the light source 12 in the reflector 10.
- the reflector 10 can consist of sheet metal and through
- Deep drawing can be made or consist of plastic and be made by injection molding.
- the shape of the reflector 10 in its apex region 16 or a central region is such that light emitted by the light source 12 is reflected by this central region 16 as a partial light bundle 20 that is at least approximately parallel or at least only slightly scattered in vertical longitudinal planes 18.
- the partial light beam 20 has an at least approximately horizontal upper light-dark boundary.
- the partial light beam 20 likewise runs at least approximately parallel in the horizontal longitudinal planes 22 or has only a slight scatter. If the partial light bundle 20 has a weak scatter, it can be weakly converging or weakly divergent.
- the central reflector region 16 can, for example, be designed such that a vertical longitudinal section through the optical axis 11 results in a parabola or at least a parabola-like curve, so that light emitted by the light source 12 is at least approximately parallel to the optical axis 11 or with respect to it this is reflected tilted downwards. Even with a horizontal longitudinal section through the central reflector region 16 containing the optical axis 11, a parabola or at least a parabola-like curve can result, so that from the
- Light source 12 emitted light is reflected at least approximately parallel to the optical axis 11. If the partial light beam 20 has a horizontal scattering, the reflector region 16 can be designed such that the horizontal line containing the optical axis 11 Longitudinal section through this alternatively gives an ellipse, an ellipse-like curve, a hyperbola, a hyperbola-like curve or any other curve.
- Peripheral reflector regions 24 adjoin the central reflector region 16.
- the reflector 10 can, for example, as shown in FIG. 2, have a larger horizontal extension than a vertical extension and be delimited at the top and bottom by approximately horizontal, flat walls 26.
- the central reflector region 16 extends essentially over the entire height of the reflector 10 and a peripheral reflector region 24 adjoins it laterally.
- the peripheral reflector regions 24 extend, for example, over the entire height of the reflector 10 or only over part of its height.
- the shape of the peripheral reflector regions 24 is such that the light emitted by the light source 12 reflects them as partial light bundles 28 converging in the horizontal longitudinal planes 22 and at least approximately parallel in the vertical longitudinal planes 18.
- the partial light bundles 28 reflected by the peripheral reflector regions 24 likewise have an at least approximately horizontally running upper light-dark boundary, which has at least approximately the same position as that
- the peripheral reflector regions 24 can be designed, for example, in such a way that a vertical or longitudinal section containing the optical axis 11 results in a parabola or at least one parabola-like curve, so that the light source 12 emitted light is reflected at least approximately parallel to the optical axis 11 or is inclined downwards with respect to this. With a horizontal one containing the optical axis 11 Longitudinal section through the peripheral reflector regions 24 can result in an ellipse or at least ellipse-like curves, so that light emitted by the light source 12 is reflected in a converging manner to the optical axis 11.
- the peripheral reflector regions 24 can also be designed in such a way that the light emitted from the light source 12 with increasing distance from the optical axis 11 is reflected in an increasingly converging manner, so that the light beams of the partial light bundles 28 reduce the optical axis 11 to a lesser extent
- the transition between the central reflector region 16 and the peripheral reflector regions 24 is preferably continuous, so that there is no step and no kink there.
- an opaque diaphragm 32 Arranged in the light exit direction 30 after the reflector 10 is an opaque diaphragm 32 which has a light passage opening 34.
- the aperture 32 covers most of the reflector 10, as shown in FIG.
- the light passage opening 34 of the diaphragm 32 has a cross section which is smaller than the cross section of the reflector 10 at its front edge 36 pointing in the light exit direction 30.
- the light passage opening 34 of the diaphragm 32 can be at least approximately circular, for example, as shown in FIG. 2, or also oval , with a greater width than height. Any other cross-sectional shapes for the light passage opening 34 of the diaphragm 32 are also possible.
- the light source 12 can also be assigned a direct light diaphragm, not shown, by means of which light which is emitted by the light source 12 directly in the light exit direction 30 and does not strike the reflector 10 is shielded.
- the diaphragm 32 is arranged in such a way that the largest possible part of the partial light beams 20 and 28 reflected by the reflector 10 through their
- Light passage opening 34 can pass through and emerge from the headlight.
- the light rays of the partial light bundles 28 reflected by the peripheral reflector regions 24 cross the optical axis 11 preferably in the area of the plane in which the diaphragm 32 is arranged or in the light exit direction 30 before or after the diaphragm 32, so that the partial light bundles 28 pass through the light passage opening 34 can.
- the partial light bundle 20 reflected by the central reflector region 16 can also pass through the light passage opening 34 of the diaphragm 32 due to its at least approximately parallel alignment to the optical axis 11.
- the partial light bundle 28 reflected by the peripheral reflector regions 24 and the partial light bundle 20 reflected by the central reflector region 16 overlap and form the light bundle emerging from the headlight.
- a translucent pane 38 can be arranged, which can form a cover pane of the headlamp.
- the cover plate 38 can be made of glass or plastic and can be essentially smooth, so that the partial light beams 20 and 28 reflected by the reflector 10 pass through them essentially unaffected.
- the cover plate 38 can also have optically effective profiles by which the partial light beams 20 and 28 reflected by the reflector 10 are influenced when they pass through the cover plate 38, that is to say they are deflected and / or scattered in certain directions.
- the light beam has a relatively short range, but this also illuminates the road edges in front of the vehicle sufficiently, which improves orientation for the driver.
- the front panel 32 can be provided, for example, with a reflective coating 40 on its front facing the light exit direction 30, or it can also be painted in the color of the body of the vehicle or in a color coordinated with it. This can improve the appearance of the headlamp.
- the diaphragm 32 can also be arranged after the cover plate 38 in the light exit direction 30 in a departure from the embodiment explained above and shown in FIG. 1.
- the cover 32 can be formed, for example, by a body part or a bumper of the vehicle, which is provided with the light passage opening 34.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/297,456 US6224245B1 (en) | 1997-10-15 | 1998-07-02 | Vehicle headlight |
EP98942479A EP0943068A1 (de) | 1997-10-15 | 1998-07-02 | Scheinwerfer für fahrzeuge |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19745467.4 | 1997-10-15 | ||
DE19745467A DE19745467A1 (de) | 1997-10-15 | 1997-10-15 | Scheinwerfer für Fahrzeuge |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999019664A1 true WO1999019664A1 (de) | 1999-04-22 |
Family
ID=7845569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/001820 WO1999019664A1 (de) | 1997-10-15 | 1998-07-02 | Scheinwerfer für fahrzeuge |
Country Status (5)
Country | Link |
---|---|
US (1) | US6224245B1 (de) |
EP (1) | EP0943068A1 (de) |
KR (1) | KR20000069303A (de) |
DE (1) | DE19745467A1 (de) |
WO (1) | WO1999019664A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11221119B2 (en) | 2014-06-08 | 2022-01-11 | Valeo North America, Inc. | Thin aspect lighting system with cutoff |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2806151B1 (fr) | 2000-03-13 | 2002-05-10 | Valeo Vision | Reflecteur pour un dispositif d'eclairage ou de signalisation de vehicule automobile, et projecteur ou feu de signalisation comportant un tel reflecteur |
US20050030759A1 (en) * | 2003-08-04 | 2005-02-10 | Guide Corporation | Bifocal hyperbolic catadioptric collection system for an automotive lamp |
DE102007040760B4 (de) * | 2007-08-29 | 2016-03-24 | Automotive Lighting Reutlingen Gmbh | Projektionsmodul eines Fahrzeugscheinwerfers |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR594856A (fr) * | 1925-03-07 | 1925-09-22 | Réflecteur composé | |
US1756084A (en) * | 1928-03-07 | 1930-04-29 | Martha W Caughlan | Reflector |
WO1979000519A1 (fr) * | 1978-01-17 | 1979-08-09 | L Cappai | Projecteur d'eclairage pour un vehicule automobile |
DE3139943A1 (de) | 1981-09-29 | 1983-04-14 | Robert Bosch Gmbh, 7000 Stuttgart | Scheinwerfer, insbesondere scheinwerfer fuer kraftfahrzeuge |
EP0341638A2 (de) * | 1988-05-09 | 1989-11-15 | Ichikoh Industries Limited | Scheinwerfer für Kraftfahrzeuge |
-
1997
- 1997-10-15 DE DE19745467A patent/DE19745467A1/de not_active Ceased
-
1998
- 1998-07-02 EP EP98942479A patent/EP0943068A1/de not_active Withdrawn
- 1998-07-02 US US09/297,456 patent/US6224245B1/en not_active Expired - Fee Related
- 1998-07-02 KR KR1019997004969A patent/KR20000069303A/ko not_active Application Discontinuation
- 1998-07-02 WO PCT/DE1998/001820 patent/WO1999019664A1/de not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR594856A (fr) * | 1925-03-07 | 1925-09-22 | Réflecteur composé | |
US1756084A (en) * | 1928-03-07 | 1930-04-29 | Martha W Caughlan | Reflector |
WO1979000519A1 (fr) * | 1978-01-17 | 1979-08-09 | L Cappai | Projecteur d'eclairage pour un vehicule automobile |
DE3139943A1 (de) | 1981-09-29 | 1983-04-14 | Robert Bosch Gmbh, 7000 Stuttgart | Scheinwerfer, insbesondere scheinwerfer fuer kraftfahrzeuge |
EP0341638A2 (de) * | 1988-05-09 | 1989-11-15 | Ichikoh Industries Limited | Scheinwerfer für Kraftfahrzeuge |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11221119B2 (en) | 2014-06-08 | 2022-01-11 | Valeo North America, Inc. | Thin aspect lighting system with cutoff |
US11384912B2 (en) | 2014-06-08 | 2022-07-12 | Valeo North America, Inc. | Thin aspect lighting system with cutoff |
US11686446B2 (en) | 2014-06-08 | 2023-06-27 | Valeo North America, Inc. | Thin aspect lighting system with cutoff |
Also Published As
Publication number | Publication date |
---|---|
KR20000069303A (ko) | 2000-11-25 |
DE19745467A1 (de) | 1999-04-22 |
US6224245B1 (en) | 2001-05-01 |
EP0943068A1 (de) | 1999-09-22 |
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