EP0213348B1 - Phare de croisement ou de brouillard pour automobiles - Google Patents
Phare de croisement ou de brouillard pour automobiles Download PDFInfo
- Publication number
- EP0213348B1 EP0213348B1 EP86109718A EP86109718A EP0213348B1 EP 0213348 B1 EP0213348 B1 EP 0213348B1 EP 86109718 A EP86109718 A EP 86109718A EP 86109718 A EP86109718 A EP 86109718A EP 0213348 B1 EP0213348 B1 EP 0213348B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reflector
- ellipse
- light
- optical axis
- halves
- 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.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—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
- F21S41/331—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas
- F21S41/332—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas with continuity at the junction between adjacent areas
Definitions
- the invention relates to a headlight for low beam or fog light of motor vehicles according to the preamble of claim 1.
- Such a headlight is known from DE 33 34 459 A1.
- This headlight has a reflector, the axial longitudinal sections of which are higher-order curves, in particular ellipses.
- a light source is arranged in the area of the inner reflector focal point.
- a diaphragm is arranged in the direction of light from the reflector apex, the optically effective edge of which forms the light-dark boundary of the light beam.
- a lens through which the edge of the diaphragm is imaged is arranged in the light direction from the diaphragm.
- the light beam of this known headlight has a long range and also illuminates the edges of the road at a great distance from the vehicle as well as the immediate area in front of the vehicle.
- the edges of the road in the vicinity of the vehicle in particular the edge of the road on the oncoming traffic side, are not adequately illuminated by the light beam.
- a headlight is known from US Pat. No. 3,492,474, which works according to the reflection principle and has a reflector which contains higher-order curves in axial longitudinal sections and in which a light source is used.
- the reflector contains a hyperbola in the horizontal central plane and a parabola in the vertical central plane.
- Lines of the reflector lying in sectional planes perpendicular to the optical axis of the reflector have an oval course. The history the lines are different above and below the optical axis.
- This design of the reflector is intended to produce a strongly horizontally scattered light beam, so that the headlight no longer needs to have a lens.
- the invention has for its object to develop a headlamp acting on the projection principle, as is known for example from the aforementioned DE 33 34 459 A1, so that the light beam generated by this also the road edges in the vicinity of the vehicle, especially on the Oncoming traffic side, sufficiently illuminated.
- FIG. 1 the first embodiment in vertical section
- 2 shows three cutting lines of the reflector formed by the sectional planes 22 to 24 in FIG. 1
- Figure 3 shows the second embodiment in section perpendicular to the reflector axis
- Figure 4 shows the light distribution of both low beam headlights on the road.
- the low beam headlight in FIG. 1 has a reflector 10 with the apex 16 and a light source 6 arranged in the region of the focal point and an axis 8.
- the meridian sections (axial sections containing the axis 8) are higher-order curves.
- In front of the reflector 10 there is an aperture 2, the optically effective edge 3 of which forms the light-dark boundary of the low beam, and there is an objective 4 in front of it which images the low beam bundle essentially formed by the reflector 10 and the aperture 2 on the roadway, not shown.
- the reflector 10 is designed asymmetrically with respect to the axis 8, which contains the horizontal center plane 17, as shown in FIG. 2:
- Lines of the reflector 10 the section planes perpendicular to the reflector axis 8 22 to 24 are formed, consist of an upper ellipse half 12 to 14 and a lower ellipse half 12 'to 14'.
- both ellipse halves have a common large axis "2a", which is offset upwards with respect to axis 8.
- the small semi-axis "b" of each ellipse half 12 to 14, 12 'to 14' lies in the vertical center plane 15 of the reflector 10 containing the axis 8.
- the normal distance (shortest distance) of the large axis "2a" is in each case both ellipse halves 12 to 14 , 12 'to 14' of the axis 8 a function of the distance of the associated cutting plane 22 to 24 from the apex 16 of the reflector 10; In a special embodiment, the normal distance is proportional to the square of the distance of the associated sectional plane 22 to 24 from the apex 16 of the reflector 10.
- the second exemplary embodiment in FIG. 3 shows the reflector 30, which is likewise asymmetrical with respect to the axis 8 and therefore the horizontal center plane 17 and has a left ellipse half 31 and a right ellipse half 31 '. Both halves are separated on the one hand by the vertical center plane 15 containing the axis 8 and on the other hand pivoted about the reflector axis 8 in such a way that the end point 32 of both large semi-axes "a" is arranged above the horizontal center plane 17.
- the swivel angle 33 of the left ellipse half 31 is equal to the swivel angle 33 of the right ellipse half 31 'of the reflector 10, the swivel angle 33 of both side halves being a function of the distance of the associated cutting plane 22 to 24 (FIG. 1) from the apex 16 of the reflector 30.
- both swivel angles can be scin of different sizes.
- the light exit edge 37, 37' is shown in dashed lines.
- the gusset 34 closes the open area between the left and right ellipse halves 31, 31 'of the reflector 30 which is lower by pivoting.
- the upper overlapping section of the left and right side halves 31, 31' of the reflector 30 is replaced by a common tangent 35 an - a gusset 36.
- the upper and lower gussets 36, 34 are part of either a plane or a spherical surface or an ellipsoid.
- FIG. 4 shows the light distribution of the low beam of the headlights described above on a measuring screen, represented by four isolux lines 40.
- the horizontal center plane HH, the vertical center plane VV and its intersection HV (vanishing point) as well as the left and right edge 41, 42 of the roadway are shown.
- the light distribution 40 limits the light-dark boundary 43 formed by the optically effective edge 3 (FIG. 1). From FIG. 4 it can be seen that both edges 41, 42 of the roadway are sufficiently and intensely illuminated, particularly in the vicinity of the motor vehicle.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Claims (11)
- Phare pour la lumière de croisement ou la lumière de brouillard de véhicules automobiles, avec un réflecteur (10) dont les coupes longitudinales axiales sont des courbes d'ordre élevé, avec une source de lumière (6) au voisinage du foyer du réflecteur, avec un écran (2) disposé à une certaine distance dans la direction de la lumière à partir du sommet (16) du réflecteur, et dont le bord optiquement efficace (3) forme la limite clair-obscur du faisceau lumineux, et avec un objectif (4) disposé dans la direction de la lumière à une certaine distance de l'écran (2) et qui projette l'image du bord (3) de l'écran, phare caractérisé en ce que le réflecteur (10) est réalisé de façon asymétrique par rapport à l'axe optique (8) de sorte que les courbes du réflecteur (10) qui sont contenues dans des plans de coupe (22 à 24) perpendiculaires à l'axe optique (8) sont constituées par respectivement une moitié d'ellipse supérieure (12 à 14) et par une moitié d'ellipse inférieure (12' à 14') différente des précédentes, tandis que respectivement deux moitiés d'ellipses comportent un demi grand axe commun (a) mais des demis petits axes (b) différents.
- Phare selon la revendication 1, caractérisé en ce que les demis grands axes communs (a) de respectivement deux moitiés d'ellipses (12 à 14, 12' à 14') sont décalés vers le haut par rapport à l'axe optique (8) du réflecteur (10), et en ce que les demis petits axes (b) des moitiés d'ellipses se situent dans le plan médian vertical (15), contenant l'axe optique (8), du réflecteur (10).
- Phare selon la revendication 2, caractérisé en ce que la distance normale entre les demis grands axes communs (a) de respectivement deux moitiés d'ellipses (12 à 14, 12' à 14') et l'axe optique (8) est une fonction de la distance entre le plan de coupe correspondant (22 à 24) et le sommet (16) du réflecteur.
- Phare selon la revendication 3, caractérisé en ce que la distance normale est proportionnelle au carré de la distance entre le plan de coupe correspondant (22 à 24) et le sommet (16) du réflecteur.
- Phare pour lumière de croisement ou lumière de brouillard de véhicules automobiles, avec un réflecteur (30) dont les coupes longitudinales axiales sont des courbes d'ordre élevé, avec une source de lumière (6) au voisinage du foyer du réflecteur, avec un écran (2) disposé à une certaine distance du sommet (16) du réflecteur dans la direction de la lumière, et dont le bord optiquement efficace (3) forme la limite clair-obscur du faisceau lumineux, et avec un objectif (4) disposé à une certaine distance de l'écran (2) dans la direction de la lumière, et qui projette l'image du bord (3) de l'écran, phare caractérisé en ce que le réflecteur (30) est asymétrique par rapport à l'axe optique (8) de sorte que les courbes du réflecteur 30 qui sont contenues dans les plans de coupe (22 à 24) perpendiculaires à l'axe optique (8) sont constituées chacune par une moitié gauche d'ellipse (31) et une moitié droite d'ellipse (31'), qui sont séparées l'une de l'autre par le plan vertical médian (15) contenant l'axe optique (8), tandis que les deux moitiés d'ellipse (31, 31') ont pivoté autour de l'axe optique (8), de sorte que les points terminaux (32) des demi grands axes (a) des deux moitiés d'ellipse sont disposés au-dessus du plan médian horizontal (17).
- Phare selon la revendication 5, caractérisé en ce que les angles de pivotement (33) des moitiés d'ellipse gauche et droite (31, 31') sont de grandeurs différentes.
- Phare selon la revendication 5, caractérisé en ce que les angles de pivotement (33) des moitiés d'ellipse gauche et droite (31, 31') sont de même grandeur.
- Phare selon la revendication 5, caractérisé en ce que les angles de pivotement (33) des moitiés d'ellipse gauche et droite (31, 31') sont une fonction de la distance entre le plan de coupe correspondant (22 à 24) et le sommet (16) du réflecteur.
- Phare selon une des revendications 5 à 8, caractérisé en ce que la zone inférieure du réflecteur (30) ouverte du fait du pivotement des deux moitiés d'ellipse (31, 31') est fermée au moyen d'un gousset (34).
- Phare selon une des revendications 5 à 9, caractérisé en ce que dans une zone supérieure du réflecteur (30), dans laquelle les deux moitiés d'ellipse (31, 31') se seraient chevauchées, elles sont remplacées par un gousset (36) formant une tangente commune.
- Phare selon la revendication 9 ou la revendication 10, caractérisé en ce que le gousset supérieur et le gousset inférieur (36, 34) sont une partie d'un plan, d'une surface sphérique ou d'un ellipsoïde.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86109718T ATE82628T1 (de) | 1985-08-31 | 1986-07-16 | Scheinwerfer fuer abblendlicht oder nebellicht von kraftfahrzeugen. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3531224 | 1985-08-31 | ||
DE19853531224 DE3531224A1 (de) | 1985-08-31 | 1985-08-31 | Scheinwerfer fuer abblendlicht oder nebellicht von kraftfahrzeugen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0213348A2 EP0213348A2 (fr) | 1987-03-11 |
EP0213348A3 EP0213348A3 (en) | 1990-02-07 |
EP0213348B1 true EP0213348B1 (fr) | 1992-11-19 |
Family
ID=6279889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86109718A Expired - Lifetime EP0213348B1 (fr) | 1985-08-31 | 1986-07-16 | Phare de croisement ou de brouillard pour automobiles |
Country Status (5)
Country | Link |
---|---|
US (1) | US4669032A (fr) |
EP (1) | EP0213348B1 (fr) |
JP (1) | JPH0797442B2 (fr) |
AT (1) | ATE82628T1 (fr) |
DE (2) | DE3531224A1 (fr) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3525041C2 (de) * | 1985-07-13 | 1994-06-16 | Bosch Gmbh Robert | Abblendlicht-oder Nebellichtscheinwerfer für Kraftfahrzeuge |
US4825343A (en) * | 1985-12-27 | 1989-04-25 | Ichikoh Industries Limited | Projector type headlamp for vehicles |
US5065287A (en) * | 1987-03-11 | 1991-11-12 | Eastman Kodak Company | Method of producing an optically effective arrangement, in particular for application with a vehicular headlight |
JP2691712B2 (ja) * | 1987-06-17 | 1997-12-17 | 日産自動車 株式会社 | プロジェクタ型の自動車用前照灯 |
JPH033921Y2 (fr) * | 1987-08-19 | 1991-01-31 | ||
JPS6486401A (en) * | 1987-09-29 | 1989-03-31 | Koito Mfg Co Ltd | Head light of vehicle |
JPH01120702A (ja) * | 1987-11-05 | 1989-05-12 | Koito Mfg Co Ltd | 車輌用前照灯 |
JPH0673241B2 (ja) * | 1988-04-04 | 1994-09-14 | 株式会社小糸製作所 | 車輌用前照灯 |
JP2508827B2 (ja) * | 1988-11-30 | 1996-06-19 | 市光工業株式会社 | 自動車用前照灯 |
DE4225370B4 (de) * | 1992-07-31 | 2004-02-05 | Robert Bosch Gmbh | Nebelscheinwerfer für Fahrzeuge |
US5461553A (en) * | 1994-09-28 | 1995-10-24 | Robert Bosch Gmbh | Headlight for vehicle |
US8419231B2 (en) | 2010-07-09 | 2013-04-16 | Leroy E. Anderson | LED extended optic tir light cover with light beam control |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1090521A (fr) * | 1953-08-31 | 1955-03-31 | Projecteur d'éclairage pour véhicule et glace destinée à ca projecteur | |
DE1037983B (de) * | 1955-12-09 | 1958-09-04 | Westfaelische Metall Industrie | Kraftfahrzeugscheinwerfer mit Zweifadenlampe |
US3492474A (en) * | 1966-12-02 | 1970-01-27 | Koito Mfg Co Ltd | Reflector with compound curvature reflecting surface |
FR2087317A5 (fr) * | 1970-05-14 | 1971-12-31 | Cibie Projecteurs | |
US3818210A (en) * | 1972-03-06 | 1974-06-18 | Westinghouse Electric Corp | Vehicular road-lighting system having a headlamp with a dual-segment reflector |
GB1476297A (en) * | 1973-09-29 | 1977-06-10 | Lucas Electrical Ltd | Motor vehicle lamp assemblies |
FR2396240A1 (fr) * | 1977-07-01 | 1979-01-26 | Cibie Projecteurs | Projecteur croisement-route de grande ouverture pour vehicule automobile |
US4303965A (en) * | 1978-10-16 | 1981-12-01 | Westinghouse Electric Corp. | Single-mode vehicular headlamp system |
JPS5669701A (en) * | 1979-11-10 | 1981-06-11 | Nissan Motor | Head light for vehicle |
JPS5851503U (ja) * | 1981-10-05 | 1983-04-07 | トヨタ自動車株式会社 | 車両用前照燈 |
FR2536502B1 (fr) * | 1982-11-19 | 1987-01-09 | Cibie Projecteurs | Projecteur de croisement pour vehicule automobile |
DE3340462C1 (de) * | 1983-11-09 | 1985-04-18 | Westfälische Metall Industrie KG Hueck & Co, 4780 Lippstadt | Abgeblendeter Fahrzeugscheinwerfer |
FR2558236B1 (fr) * | 1984-01-12 | 1986-05-23 | Cibie Projecteurs | Perfectionnemens aux projecteurs automobiles a faisceau coupe |
DE3417034A1 (de) * | 1984-05-09 | 1985-11-14 | Robert Bosch Gmbh, 7000 Stuttgart | Scheinwerfer, insbesondere abblendlicht-scheinwerfer, fuer kraftfahrzeuge |
-
1985
- 1985-08-31 DE DE19853531224 patent/DE3531224A1/de not_active Ceased
-
1986
- 1986-07-16 EP EP86109718A patent/EP0213348B1/fr not_active Expired - Lifetime
- 1986-07-16 DE DE8686109718T patent/DE3687135D1/de not_active Expired - Lifetime
- 1986-07-16 AT AT86109718T patent/ATE82628T1/de not_active IP Right Cessation
- 1986-07-29 US US06/893,894 patent/US4669032A/en not_active Expired - Lifetime
- 1986-08-29 JP JP61201884A patent/JPH0797442B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS6252801A (ja) | 1987-03-07 |
DE3531224A1 (de) | 1987-03-05 |
US4669032A (en) | 1987-05-26 |
EP0213348A2 (fr) | 1987-03-11 |
EP0213348A3 (en) | 1990-02-07 |
DE3687135D1 (de) | 1992-12-24 |
JPH0797442B2 (ja) | 1995-10-18 |
ATE82628T1 (de) | 1992-12-15 |
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