EP0884522A2 - Kraftfahrzeugscheinwerfer mit einer Zweifadenlampe - Google Patents
Kraftfahrzeugscheinwerfer mit einer Zweifadenlampe Download PDFInfo
- Publication number
- EP0884522A2 EP0884522A2 EP98100383A EP98100383A EP0884522A2 EP 0884522 A2 EP0884522 A2 EP 0884522A2 EP 98100383 A EP98100383 A EP 98100383A EP 98100383 A EP98100383 A EP 98100383A EP 0884522 A2 EP0884522 A2 EP 0884522A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- reflector
- filament
- double
- headlight
- focal point
- 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
-
- 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 present invention relates to a headlight for motor vehicles, using a double-filament lamp to obtain the two functions of low beam and high beam.
- the headlights of this type currently on the market comprise a reflector in a single parabolic body and a segmented or free-shaped surface, and a transparent front protection which may or may not be provided with a pattern of optical prisms.
- An outer protective envelope can be placed round the reflector, forming the body of the headlight.
- the double-filament lamp is positioned in the reflector so that the shield situated inside its bulb coinciding with the low beam filament is beneath the optical axis of the headlight, as shown in appended Figure 1.
- the upper half-parabola is dedicated to the low beam function, whereas the whole surface of the parabola is used for the high beam function: the focal point of the parabola is disposed on the center line of the high beam filament, and the low beam filament is "out of focus" forward of the focal point of said parabola (see Figure 2).
- the light distribution on the road surface created by headlights with a classical parabola is achieved through a pattern of optical prisms on the transparent protection.
- the upper half-reflector is still dedicated to the low beam function, whereas the whole surface of the reflector is used for the high beam function.
- the basic reflectors are generally portions of parabolas on which are laid sectors of surface with a definite and variable slant and bending radius.
- the focal point of the lower basic parabola is still positioned in the middle of the high-beam filament, whereas the low-beam filament is "out of focus" forward of the focal point of the upper basic parabola (see Figure 3).
- the light distribution on the road surface created by headlights having reflectors with a segmented or free-shaped surface is achieved directly by the reflector itself.
- This second solution improves the distribution of the low beam on the road surface with respect to the first solution (with parabolic reflectors), shown in Figure 2. However, it does not substantially improve the light distribution of the high beam on the road surface, although it does improve the depth of said beam. In fact, to obtain an improvement, a dedicated supplementary high beam must generally be placed alongside the headlight.
- the object of the invention is to improve the distribution on the road surface of the low beam and the high beam of a headlight with a double-filament lamp.
- Another object of the invention is to provide a solution that is easy to apply, and that does not involve substantial modifications to existing headlights.
- the double-filament lamp to be positioned in the reflector so that the shield of the lower beam filament situated inside its bulb is above the optical axis of the reflector.
- the reflector can advantageously have a segmented or free-shaped surface, the lower half reflector being dedicated to the low beam function and the whole surface of the reflector being used for the high beam function.
- the focal point of the upper basic parabola is situated in the middle of the high beam filament, whereas the lower beam filament is "out of focus" to the rear of the focal point of the lower basic parabola.
- the proposed solution does not make it essential to use additional devices on vehicles to achieve an acceptable performance, as is required in some traditional solutions, thus allowing vehicle manufacturers a cost saving.
- a classical double-filament lamp indicated by reference numeral 1
- a classical double-filament lamp is depicted in a side view and substantially comprises a bulb 2, with the front surface 3 opacized, to shield the rays of light in this area.
- a first filament 10 normally serving to produce the high beam
- a second filament 20 normally serving to produce the low beam.
- Beneath the filament 20 is disposed a shield or dish S, that prevents the filament 20 from diffusing beneath the median plane of the lamp 1.
- Figure 2 illustrates the first known solution previously described, in which the lamp 1 is disposed in a classical parabolic reflector in a single body indicated by R, the focal point F of which is positioned on the midline of the high-beam filament 20.
- the low-beam filament 30 on the other hand is disposed "out of focus" forward of the focal point F.
- Figure 3 is a diagrammatic representation of the second solution according to the previously described prior art, in which the reflector is segmented and is depicted in particular with two segments of parabolas offset with respect to each other, R1, R2, having vertexes V1, V2 and focal points F1, F2, respectively.
- the lamp 1 is disposed so that the filament 20 is centered on the focal point F1 of the lower half-parabola R1, while the filament 30 is still out of focus forward of the focal point F2 of the upper half parabola R2.
- the examples of some reflected beams show how the high beam is directed in depth or upwards, with poor illumination of the road surface.
- the reflector is shown segmented, with two half parabolas R1, R2.
- the filament 20 of the high beam is centered on the focal point F1 of the upper half parabola R1, while the filament 30 producing the low beam is "out of focus" to the rear of the focal point F2 of the lower half parabola R2.
- the solution proposed by the invention which essentially consists in shielding the low beam filament 30 on the upper side and suitably positioning the lamp 1 on the axis X of the reflector, substantially improves the distribution of the low beam on the road surface with respect to the prior art, and also substantially improves the distribution of the high beam on the road surface, at the same time maintaining an excellent performance in depth.
- the invention therefore fully achieves the proposed aims.
- the reflector can be a classical rather than a segmented reflector, although in this case the performance is obviously inferior.
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)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT97MI001395A IT1292152B1 (it) | 1997-06-12 | 1997-06-12 | Proiettore per veicoli a motore con lampada bifilamento |
ITMI971395 | 1997-06-12 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0884522A2 true EP0884522A2 (de) | 1998-12-16 |
EP0884522A3 EP0884522A3 (de) | 2000-10-04 |
EP0884522B1 EP0884522B1 (de) | 2005-11-16 |
Family
ID=11377355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98100383A Expired - Lifetime EP0884522B1 (de) | 1997-06-12 | 1998-01-12 | Kraftfahrzeugscheinwerfer mit einer Zweifadenlampe |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0884522B1 (de) |
AT (1) | ATE310206T1 (de) |
DE (1) | DE69832327T2 (de) |
ES (1) | ES2253791T3 (de) |
IT (1) | IT1292152B1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7461953B2 (en) | 2004-11-26 | 2008-12-09 | Koito Manufacturing Co., Ltd. | Vehicle headlamp |
CN105020650A (zh) * | 2014-04-30 | 2015-11-04 | 王正 | 车灯模块 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007062136A1 (de) * | 2007-12-21 | 2009-06-25 | Hella Kgaa Hueck & Co. | Scheinwerfer für Fahrzeuge |
DE102010013821B4 (de) * | 2010-04-03 | 2016-09-15 | Volkswagen Ag | Leuchtenvorrichtung und Verfahren zur Erzeugung einer ersten und einer zweiten Lichtfunktion für ein Fahrzeug |
DE102010014205A1 (de) * | 2010-04-08 | 2011-10-13 | Willi Wolfgang Oswald | Leuchte mit Nebelmaschine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2547164A1 (de) * | 1974-10-23 | 1976-05-06 | Erik Wilkenson | Vorrichtung an einem scheinwerfer fuer kraftfahrzeuge |
DE2757713A1 (de) * | 1977-12-23 | 1979-06-28 | Bayerische Motoren Werke Ag | Scheinwerfer fuer kraftfahrzeuge |
FR2499673A1 (fr) * | 1981-02-10 | 1982-08-13 | Bosch Gmbh Robert | Phare pour vehicules automobiles |
US4566056A (en) * | 1984-03-08 | 1986-01-21 | Stanley Electric Co., Ltd. | Headlamp for vehicle |
-
1997
- 1997-06-12 IT IT97MI001395A patent/IT1292152B1/it active IP Right Grant
-
1998
- 1998-01-12 AT AT98100383T patent/ATE310206T1/de not_active IP Right Cessation
- 1998-01-12 ES ES98100383T patent/ES2253791T3/es not_active Expired - Lifetime
- 1998-01-12 DE DE69832327T patent/DE69832327T2/de not_active Expired - Fee Related
- 1998-01-12 EP EP98100383A patent/EP0884522B1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2547164A1 (de) * | 1974-10-23 | 1976-05-06 | Erik Wilkenson | Vorrichtung an einem scheinwerfer fuer kraftfahrzeuge |
DE2757713A1 (de) * | 1977-12-23 | 1979-06-28 | Bayerische Motoren Werke Ag | Scheinwerfer fuer kraftfahrzeuge |
FR2499673A1 (fr) * | 1981-02-10 | 1982-08-13 | Bosch Gmbh Robert | Phare pour vehicules automobiles |
US4566056A (en) * | 1984-03-08 | 1986-01-21 | Stanley Electric Co., Ltd. | Headlamp for vehicle |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7461953B2 (en) | 2004-11-26 | 2008-12-09 | Koito Manufacturing Co., Ltd. | Vehicle headlamp |
CN105020650A (zh) * | 2014-04-30 | 2015-11-04 | 王正 | 车灯模块 |
CN105020650B (zh) * | 2014-04-30 | 2017-11-10 | 王正 | 车灯模块 |
Also Published As
Publication number | Publication date |
---|---|
ATE310206T1 (de) | 2005-12-15 |
DE69832327D1 (de) | 2005-12-22 |
ITMI971395A1 (it) | 1998-12-12 |
DE69832327T2 (de) | 2006-08-10 |
EP0884522A3 (de) | 2000-10-04 |
ITMI971395A0 (de) | 1997-06-12 |
EP0884522B1 (de) | 2005-11-16 |
ES2253791T3 (es) | 2006-06-01 |
IT1292152B1 (it) | 1999-01-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6416210B1 (en) | Headlamp for a vehicle | |
JP3964089B2 (ja) | 車両用前照灯 | |
US6402355B1 (en) | Vehicular headlamp having improved low-beam illumination | |
US4862329A (en) | Vehicular headlamp | |
JPH01120702A (ja) | 車輌用前照灯 | |
US4972307A (en) | Structure of headlamps for vehicles | |
JPH06187806A (ja) | 二連フィラメントのフォグランプ内蔵型自動車用前照灯 | |
JPS61245401A (ja) | 楕円面反射器と放物面反射器とを組合わせた自動車用主ビ−ム前照灯 | |
EP0579184B1 (de) | Scheinwerfer für Kraftfahrzeuge | |
EP0884522B1 (de) | Kraftfahrzeugscheinwerfer mit einer Zweifadenlampe | |
GB2254684A (en) | Headlamp unit for vehicles | |
EP0106616B1 (de) | Scheinwerfer für Strassenfahrzeuge | |
US5003447A (en) | Lamp reflector | |
JP4009392B2 (ja) | 車両用前照灯 | |
US4520433A (en) | Motor vehicle headlamp | |
JP2558793Y2 (ja) | 車両用前照灯 | |
JPH0337242B2 (de) | ||
JP2517383B2 (ja) | 車輌用前照灯 | |
JPH01159902A (ja) | 自動車用前照灯 | |
EP0096785A1 (de) | Abgestutzter Fahrzeugscheinwerfer | |
JPH0418406B2 (de) | ||
CN212005542U (zh) | 一种增强汽车近光车灯远场亮度的照明装置 | |
JPS638002Y2 (de) | ||
JPS6026401Y2 (ja) | 車両用ヘツドランプ | |
JP2517384B2 (ja) | 車輌用前照灯 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH DE ES FR GB GR IT LI NL PT |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
17P | Request for examination filed |
Effective date: 20010223 |
|
AKX | Designation fees paid |
Free format text: AT BE CH DE ES FR GB GR IT LI NL PT |
|
17Q | First examination report despatched |
Effective date: 20040816 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE ES FR GB GR IT LI NL PT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20051116 Ref country code: LI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20051116 Ref country code: CH Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20051116 Ref country code: BE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20051116 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: 7F 21S 8/10 A |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REF | Corresponds to: |
Ref document number: 69832327 Country of ref document: DE Date of ref document: 20051222 Kind code of ref document: P |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060216 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060216 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060417 |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2253791 Country of ref document: ES Kind code of ref document: T3 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20060817 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20060216 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20070129 Year of fee payment: 10 Ref country code: AT Payment date: 20070129 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20070131 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20061229 Year of fee payment: 10 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080801 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080112 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20081029 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20080114 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080131 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080114 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080112 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20161202 Year of fee payment: 20 |