EP0307657A2 - Projecteur pour véhicule automobile - Google Patents
Projecteur pour véhicule automobile Download PDFInfo
- Publication number
- EP0307657A2 EP0307657A2 EP19880113557 EP88113557A EP0307657A2 EP 0307657 A2 EP0307657 A2 EP 0307657A2 EP 19880113557 EP19880113557 EP 19880113557 EP 88113557 A EP88113557 A EP 88113557A EP 0307657 A2 EP0307657 A2 EP 0307657A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- reflector
- paraboloid
- section
- optical axis
- segment
- 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
Images
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
- F21S41/334—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
-
- 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
- F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
- F21S41/164—Incandescent light sources, e.g. filament or halogen lamps having two or more filaments
Definitions
- the invention relates to a headlight according to the preamble of the main claim.
- a fog lamp which is known from DE-OS 35 27 391
- the reflector consists of an upper section, the vertical section of which is part of an ellipse and the section along the horizontal central plane is part of a parabola.
- the focal length of the paraboloid, the ellipse and the parabola are identical.
- the reflector therefore has only a single focal length.
- the focal point lies in the cylindrical filament that lies on the optical axis.
- the reflector for headlights of motor vehicles allows the manufacture of a reflector made of sheet metal or plastic, which is equipped with a lamp with an axial filament without a cap.
- a headlight produces a low beam of the European asymmetrical low beam distribution with a sharp cut-off line that runs horizontally to the left of the center and rises to the right at an angle of 15 °.
- the full reflector surface can be used and a significant gain in luminous flux compared to the previous design of dipped-beam headlamps with a lamp with dimming cap (H4) combined with improved side scatter and apron lighting. Appropriate enlargement of the reflector area used for the range achieves a higher illuminance.
- the lamp vertically upward, ie above the optical axis, in order to increase the sharpness of the light-dark boundary on the left horizontal side of the light distribution.
- FIG. 1 shows the rear of a rectangular reflector, a low-beam headlight for motor vehicles, in a schematic illustration.
- 2 shows a vertical section II-II in FIG. 1 through a headlight with an inserted incandescent lamp.
- Figure 3 is a schematic representation of a European light distribution of the reflector on a measuring screen.
- Figure 4 is a schematic representation of the light distribution according to the US standard.
- the reflector 1 shows the rear of a rectangular reflector 1, the reflection surface of which is formed from a plurality of segments, in the present exemplary embodiment from four segments.
- the reflector 1 has an upper boundary surface 2 and a lower boundary surface 3, both of which run essentially parallel to the horizontal axis 4 of the reflector 1 and have no optical effect.
- a third segment 12 extends from the lower boundary surface 3 up to the horizontal axis 4 and extends from the right boundary surface 11 up to the vertical axis 5 of the reflector.
- a fourth segment 15 extends from the lower boundary surface 3 of the reflector up to the 15 ° sector of the first segment going down from the horizontal axis 4 and extends from the left boundary surface 8 to the vertical axis 5 of the reflector.
- Segment 15 is part of a general paraboloid. This is a body shape that has different parabolic focal lengths in the horizontal and vertical section and thus creates a chain of parabolic focal lengths in the axis of the reflector when changing from the horizontal to the vertical or vice versa.
- the entire reflector presents itself as a body made up of partial bodies of the reflector segments which merge into one another in a stepless manner and has a single common apex.
- an incandescent lamp 17 is used to generate a low beam according to the European standard (standard designation H1) or according to the US standard (standard designation 9006) (see FIG. 2).
- This lamp has an axial incandescent filament 18, which is oriented essentially parallel or coaxial to the reflector axis 7 and has no cover cap. There is no cover cap obstructing the ventilation and light emission of the lamp, therefore a heat build-up in the area of the lamp is avoided and the life of the lamp is increased.
- the use of the full reflector surface in the case of the H1 lamp brings about a considerable increase in luminous flux compared to the known low beam which is produced with a lamp of the H4 standard provided with a cover cap. It follows that even with small dimensions of the reflector 1, a good quality low beam is generated.
- a gas discharge lamp can also be used.
- the low beam headlight in FIG. 2 shows a rectangular reflector 1 with a reflection surface 20, a light exit opening 21 and an apex 22. A neck 23 protrudes from the latter, on the end face of which the flange of an incandescent lamp 17 is supported in the axial direction and in the radial direction Centered direction.
- the incandescent lamp 17 has a cylindrical incandescent filament 18, the cylinder axis of which is approximately parallel or coaxial to the reflection axis 7.
- the cylinder axis of the incandescent filament 18 is installed vertically upward and or laterally offset in another embodiment described in more detail below with respect to the optical axis 7.
- one or more shading webs running along the lamp can also be used.
- segments 6 and 15 can be seen in section as reflection surface 20 in the direction of the reflected rays according to arrow 27.
- the upper first segment 6 is a rotating paraboloid and the lower fourth segment 15 is a general paraboloid.
- the focal point 24 of the upper first segment 6 lies in the rear, i.e. the section of the incandescent filament 18 facing the apex 22 of the reflector 1 and the vertical focal point 25 of the general paraboloid 15 which can be seen in section lies in the front, i.e. Section of the incandescent filament 18 facing the light exit opening 21 of the reflector 1.
- the chain of parabolic focal lengths which occurs in the general paraboloid extends from the focal point 25 towards the focal point 24, as indicated by arrow 28.
- the second and third segments 9 and 12 which cannot be seen in the section in FIG. 2, are part of a parellipsoid, a focal point 26 of the upper, second segment 9 being recognizable in section.
- a chain of focal lengths which begins at focal point 24 and extends to focal point 26, as shown by arrow 29.
- focal point 25 arrow 32.
- the entirety of the focus chain follows from the reflector geometry and is determined by stepwise imaging scanning in the direction of the arrow 30 in FIG. 1.
- the focus chain of the upper two segments lies in the area of the Wendelan initially, close to the reflector apex and that of the lower two segments at the end of the incandescent filament 18 that is distant from the apex.
- the flipping of the filament images downward through the continuous migration of the focal lengths that occur from the beginning of the incandescent filament to the end of the incandescent filament and vice versa is achieved by the corresponding reflector geometry. This also ensures that all spiral images are arranged below the cut-off line.
- the different geometries of the individual segments lead to a continuous overall reflector shape that has no step between the segments.
- the transitions of the individual geometric shapes of the segments are designed so that they have a common tangent. This makes it easier to manufacture in sheet metal or plastic, the glare effects that occur at the edges or steps of the segments are eliminated, and glare is reduced.
- the segments forming the reflector have a common vertex and the geometrical shapes of the individual segments can be enlarged or reduced to adapt the desired light distributions to one another.
- the various segment shapes can be accommodated in a round, oval, square or polygonal headlight.
- FIG. 3 shows, in the direction of the rays reflected by the reflector 1, a measuring screen 33 with a horizontal central plane 34 and a vertical central plane 35, which intersect at the "HV" point.
- the first segment 6 forms the light spot 37 of the total light distribution 36.
- the light spot 37 which begins approximately from the vertical center plane 35 and extends to the right to the outer right measuring screen side 41, forms part of the light-dark boundary with the typical 15 ° rise On the right side.
- the second segment 9 forms the light spot 38 of the total light distribution 36 starting from the vertical central plane 35.
- Segment 12 forms the light spot 39 and segment 15 forms the light spot 40.
- the raw light beam consisting of the light spots 37, 38, 39, 40 falls below the prescribed light / dark limit 42. Due to the parameters of the reflection surface 20 according to the invention as the sum of the segments 6, 9, 12, 15, the raw light beam corresponds to the resulting raw light distribution, ie the light distribution without the lens essentially corresponds to the low beam illuminating the road. For this reason, essentially no or only a few optical means which form the raw light beam to the low beam are required on the lens of the low beam headlight, not shown. It also follows that the lens can be tilted more.
- An asymmetrical, horizontal arrangement of a reflector means that the area of the reflector which is used for the range can be enlarged and there is a greater illuminance in the distance.
- a reflector arrangement according to Figure 4, which also consists of four segments 6 ', 50, 51 and 15' does not show a 15 ° line 45 as in Figure 3.
- This arrangement is a reflector according to the US standard SAE, which also has different segments, each of which extends to the central axes of the reflector.
- the second segment 50 consists of part of a general paraboloid and the third segment 51 consists of part of a rotational paraboloid.
- the segments 50, 51 form in particular the light spot 48 and the first and fourth segments 6 ', 9' form the light spot 49.
- the entire reflector leads to an overall light distribution 52.
- This reflector geometry leads to an optimization of the so-called "hot spots", i.e. the range of the USA low beam.
- hot spots i.e. the range of the USA low beam.
- all the spiral images are concentrated on the lower right quadrant of the measuring screen 33 due to the reflector geometry.
- the geometric arrangement of the reflector means that the maximum illuminance is just below the light-dark The limit comes to lie and thus a large range is achieved.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873731232 DE3731232A1 (de) | 1987-09-17 | 1987-09-17 | Scheinwerfer fuer fahrzeuge, insbesondere scheinwerfer fuer kraftfahrzeuge |
DE3731232 | 1987-09-17 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0307657A2 true EP0307657A2 (fr) | 1989-03-22 |
EP0307657A3 EP0307657A3 (en) | 1990-03-14 |
EP0307657B1 EP0307657B1 (fr) | 1994-11-23 |
Family
ID=6336224
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88113557A Expired - Lifetime EP0307657B1 (fr) | 1987-09-17 | 1988-08-20 | Projecteur pour véhicule automobile |
Country Status (4)
Country | Link |
---|---|
US (1) | US4924359A (fr) |
EP (1) | EP0307657B1 (fr) |
JP (1) | JP2654116B2 (fr) |
DE (2) | DE3731232A1 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2253043A (en) * | 1991-01-25 | 1992-08-26 | Koito Mfg Co Ltd | Vehicle headlight reflector |
FR2694798A1 (fr) * | 1992-08-14 | 1994-02-18 | Koito Mfg Co Ltd | Réflecteur de phare de voiture à surfaces réfléchissantes intérieure et extérieure. |
US5408363A (en) * | 1991-06-21 | 1995-04-18 | Kano; Tetsuhiro | Reflector and a method of generating a reflector shape |
EP0709619A1 (fr) * | 1994-10-27 | 1996-05-01 | MAGNETI MARELLI U.K. Ltd. | Projecteur pour véhicule avec un réflecteur comportant plusieurs secteurs |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0658761B2 (ja) * | 1988-11-08 | 1994-08-03 | 株式会社小糸製作所 | 前照灯用反射鏡 |
DE3919334A1 (de) * | 1989-06-13 | 1990-12-20 | Tetsuhiro Kano | Reflektor fuer eine leuchte |
JPH0368305U (fr) * | 1989-11-02 | 1991-07-04 | ||
DE4002576C5 (de) * | 1990-01-30 | 2005-06-02 | Automotive Lighting Reutlingen Gmbh | Scheinwerfer mit Abblend- und Fernlicht für Kraftfahrzeuge |
JP2604646B2 (ja) * | 1991-01-28 | 1997-04-30 | 株式会社小糸製作所 | 車輌用前照灯の反射鏡 |
DE4131483A1 (de) * | 1991-09-21 | 1993-03-25 | Bosch Gmbh Robert | Scheinwerfer fuer kraftfahrzeuge |
DE4206881A1 (de) * | 1992-03-05 | 1993-09-09 | Bosch Gmbh Robert | Abblendlichtscheinwerfer fuer kraftfahrzeuge |
US5394317A (en) * | 1992-11-03 | 1995-02-28 | Grenga; John J. | Lamp reflector |
DE4327690A1 (de) * | 1992-11-06 | 1994-05-11 | Bosch Gmbh Robert | Beleuchtungseinrichtung für Fahrzeuge |
DE4238274C2 (de) * | 1992-11-13 | 1999-04-01 | Bosch Gmbh Robert | Mehrbereichreflektor als Bestandteil eines Kraftfahrzeugscheinwerfers |
JP2764369B2 (ja) * | 1993-07-26 | 1998-06-11 | 株式会社小糸製作所 | 車輌用前照灯の反射鏡 |
US5506471A (en) * | 1994-06-06 | 1996-04-09 | General Electric Company | Low glare infrared light source |
FR2732747B1 (fr) * | 1995-04-06 | 1997-06-20 | Valeo Vision | Projecteur de vehicule automobile capable d'emettre un faisceau delimite par une coupure a deux demi-plans decales en hauteur |
CZ287690B6 (cs) * | 1996-01-29 | 2001-01-17 | Autopal S. R. O. | Světlomet s komplexním reflektorem |
FR2792999B1 (fr) * | 1999-04-29 | 2001-09-14 | Valeo Vision | Projecteur bi-fonction a source unique et a optique fixe pour vehicule automobile |
KR20050025993A (ko) * | 2002-07-26 | 2005-03-14 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 조명 시스템 |
US7829899B2 (en) | 2006-05-03 | 2010-11-09 | Cree, Inc. | Multi-element LED lamp package |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3492474A (en) * | 1966-12-02 | 1970-01-27 | Koito Mfg Co Ltd | Reflector with compound curvature reflecting surface |
US4481563A (en) * | 1982-05-10 | 1984-11-06 | Corning Glass Works | Automotive headlight having optics in the reflector |
US4530042A (en) * | 1982-11-19 | 1985-07-16 | Cibie Projecteurs | Dipped headlamp for automobiles |
DE3527391A1 (de) * | 1985-07-31 | 1987-02-05 | Bosch Gmbh Robert | Nebelscheinwerfer fuer kraftfahrzeuge |
DE3531223A1 (de) * | 1985-08-31 | 1987-03-05 | Bosch Gmbh Robert | Scheinwerfer, insbesondere rechteckscheinwerfer, fuer abblendlicht von kraftfahrzeugen |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2545152B1 (fr) * | 1983-04-27 | 1985-08-16 | Cibie Projecteurs | |
FR2599120B1 (fr) * | 1986-05-26 | 1988-09-16 | Cibie Projecteurs | Projecteurs de croisement sans coupelle a concentration decalee |
FR2599121B1 (fr) * | 1986-05-26 | 1988-09-16 | Cibie Projecteurs | Projecteur de croisement sans coupelle a concentration decalee |
-
1987
- 1987-09-17 DE DE19873731232 patent/DE3731232A1/de not_active Ceased
-
1988
- 1988-08-20 DE DE3852159T patent/DE3852159D1/de not_active Expired - Fee Related
- 1988-08-20 EP EP88113557A patent/EP0307657B1/fr not_active Expired - Lifetime
- 1988-08-29 US US07/237,195 patent/US4924359A/en not_active Expired - Fee Related
- 1988-09-13 JP JP63227662A patent/JP2654116B2/ja not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3492474A (en) * | 1966-12-02 | 1970-01-27 | Koito Mfg Co Ltd | Reflector with compound curvature reflecting surface |
US4481563A (en) * | 1982-05-10 | 1984-11-06 | Corning Glass Works | Automotive headlight having optics in the reflector |
US4530042A (en) * | 1982-11-19 | 1985-07-16 | Cibie Projecteurs | Dipped headlamp for automobiles |
DE3527391A1 (de) * | 1985-07-31 | 1987-02-05 | Bosch Gmbh Robert | Nebelscheinwerfer fuer kraftfahrzeuge |
DE3531223A1 (de) * | 1985-08-31 | 1987-03-05 | Bosch Gmbh Robert | Scheinwerfer, insbesondere rechteckscheinwerfer, fuer abblendlicht von kraftfahrzeugen |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2253043A (en) * | 1991-01-25 | 1992-08-26 | Koito Mfg Co Ltd | Vehicle headlight reflector |
GB2253043B (en) * | 1991-01-25 | 1995-05-03 | Koito Mfg Co Ltd | Reflector for vehicular headlight |
US5408363A (en) * | 1991-06-21 | 1995-04-18 | Kano; Tetsuhiro | Reflector and a method of generating a reflector shape |
EP0519112B1 (fr) * | 1991-06-21 | 1996-03-13 | Tetsuhiro Kano | Réflecteur et procédé de génération de la forme du réflecteur |
FR2694798A1 (fr) * | 1992-08-14 | 1994-02-18 | Koito Mfg Co Ltd | Réflecteur de phare de voiture à surfaces réfléchissantes intérieure et extérieure. |
EP0709619A1 (fr) * | 1994-10-27 | 1996-05-01 | MAGNETI MARELLI U.K. Ltd. | Projecteur pour véhicule avec un réflecteur comportant plusieurs secteurs |
GB2294536A (en) * | 1994-10-27 | 1996-05-01 | Carello Lighting Plc | Vehicle headlight with a complex-surface reflector |
GB2294536B (en) * | 1994-10-27 | 1998-06-17 | Carello Lighting Plc | Vehicle headlight with a complex-surface reflector |
Also Published As
Publication number | Publication date |
---|---|
EP0307657B1 (fr) | 1994-11-23 |
EP0307657A3 (en) | 1990-03-14 |
DE3852159D1 (de) | 1995-01-05 |
JP2654116B2 (ja) | 1997-09-17 |
US4924359A (en) | 1990-05-08 |
JPH0197301A (ja) | 1989-04-14 |
DE3731232A1 (de) | 1989-03-30 |
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