EP0849523A2 - Lampe de véhicule. - Google Patents

Lampe de véhicule. Download PDF

Info

Publication number
EP0849523A2
EP0849523A2 EP97309941A EP97309941A EP0849523A2 EP 0849523 A2 EP0849523 A2 EP 0849523A2 EP 97309941 A EP97309941 A EP 97309941A EP 97309941 A EP97309941 A EP 97309941A EP 0849523 A2 EP0849523 A2 EP 0849523A2
Authority
EP
European Patent Office
Prior art keywords
paraboloidal
zone
main zone
reflector
segments
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.)
Ceased
Application number
EP97309941A
Other languages
German (de)
English (en)
Other versions
EP0849523A3 (fr
Inventor
Francis Thompson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koito Europe Ltd
Original Assignee
Britax Vega Ltd
Koito Europe Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Britax Vega Ltd, Koito Europe Ltd filed Critical Britax Vega Ltd
Publication of EP0849523A2 publication Critical patent/EP0849523A2/fr
Publication of EP0849523A3 publication Critical patent/EP0849523A3/fr
Ceased legal-status Critical Current

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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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/20—Direction indicator lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles

Definitions

  • This invention relates to a vehicle lamp for mounting near a corner of a vehicle so as to be visible over a wide angular range, of the type comprising a reflector with a substantially paraboloidal main zone and a side zone comprising a series of paraboloidal segments having the same focus and axis as the paraboloid of the main zone with a respective step between each pair of adjacent segments.
  • Lamps of this type are commonly used as turn signal lamps. Such lamps are required to display a relatively bright light in directions generally parallel to the direction of motion of the vehicle, so as to be visible to drivers of other vehicles from a substantial distance. They are also required to be visible from the side of the vehicle, although a lower brightness is acceptable in this direction. In order to obtain the required brightness in directions parallel to the direction of travel, it is preferable for such a lamp to have a paraboloidal reflector. In order to obtain the required visibility from the side of the vehicle, it is necessary to cut away part of the paraboloidal reflector to allow light to reach the side of the lamp directly from the bulb.
  • Figure 1 shows a lamp assembly 10 comprising a left-hand rear lamp cluster for a motor car.
  • the assembly 10 includes a first lens 12 for a turn signal indicator, a second lens 14 for a reversing lamp, a third lens 16 for a stop/tail lamp, a reflex reflector 18,and a fourth lens 20 for a rear fog lamp.
  • the present invention is concerned with the reflector for the turn signal indicator behind the lens 12.
  • Figures 2, 3 and 4 show a known reflector and bulb assembly for fitting behind the lens 12 of Figure 1.
  • the reflector 30 has a paraboloidal main zone 32 containing a hole 34 behind which is a bulb holder (not shown) for a bulb 36.
  • a side zone 38 comprising a series of annular paraboloidal segments such as the segment 40, separated from adjacent segments by steps such as the step 42.
  • the bottom of the side zone 38 is separated from the adjacent part of the main zone 32 by a wall 44 of generally triangular shape.
  • the effect of this is that the path length of light from the filament of the bulb 36 to the lens 12 ( Figure 1) via the main zone 32 is substantially less than that reaching an immediately adjacent part of the lens 12 via the outer segments of the side zone 38.
  • the result of this is that there is a significant change in the brightness of the lens along a line corresponding to the wall 44.
  • a similar effect occurs at the upper edge of the zone 38, although this is somewhat mitigated because the tapering shape of the lens 12 in this region provides room for intermediate paraboloidal segments 46.
  • FIGS 5, 6 and 7 illustrate a reflector and bulb assembly in accordance with the invention which gives a more uniform appearance to the distribution of light over the lens 12.
  • the reflector 50 has a paraboloidal main zone 52 containing a hole 54 behind which is accommodated a bulb holder (not shown) for a bulb 56.
  • the reflector 50 also has a left-hand side zone 58 comprising a series of paraboloidal segments having the same focus and axis as the paraboloid of the main zone 52.
  • the segment 60 is separated from an adjacent segment by the step 62.
  • the shape of the segments is chosen to be such that there is only one segment 64 which is separated from the main zone 52 by a single step 66.
  • the steps are straight and parallel to one another.
  • the maximum change in path length of light from the filament of the bulb 56 to adjacent parts of the lens 12 is determined by the height of the steps such as the steps 62 and 66. Consequently, there is no sudden change in the brightness of adjacent parts of the lens, the changes due to light from successive segments being imperceptible to the eye.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP97309941A 1996-12-21 1997-12-10 Lampe de véhicule. Ceased EP0849523A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9626638.2A GB9626638D0 (en) 1996-12-21 1996-12-21 Vehicle lamp
GB9626638 1996-12-21

Publications (2)

Publication Number Publication Date
EP0849523A2 true EP0849523A2 (fr) 1998-06-24
EP0849523A3 EP0849523A3 (fr) 1999-03-10

Family

ID=10804857

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97309941A Ceased EP0849523A3 (fr) 1996-12-21 1997-12-10 Lampe de véhicule.

Country Status (4)

Country Link
EP (1) EP0849523A3 (fr)
JP (1) JPH10188605A (fr)
KR (1) KR19980064217A (fr)
GB (1) GB9626638D0 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2334326A (en) * 1998-02-17 1999-08-18 Koito Mfg Co Ltd Reflector for vehicle marker lamp
FR2811407A1 (fr) 2000-07-08 2002-01-11 Hella Kg Hueck & Co Feu pour vehicules
DE10357399A1 (de) * 2003-12-06 2005-08-18 Johann & Konen Gmbh & Co Flachbauender Reflektor
US10697606B1 (en) 2019-07-19 2020-06-30 North American Lighting, Inc. Vehicle lamp

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1021159A (en) * 1963-11-18 1966-03-02 Lucas Industries Ltd Lamps
US4213171A (en) * 1976-06-24 1980-07-15 Sassmannshausen Knut Lighting fixture with side escape window
FR2590351B1 (fr) * 1985-11-15 1988-02-05 Cibie Projecteurs Feu de signalisation a double fonction pour vehicule
DE4124373A1 (de) * 1991-07-23 1993-01-28 Hella Kg Hueck & Co Blinkleuchte

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2334326A (en) * 1998-02-17 1999-08-18 Koito Mfg Co Ltd Reflector for vehicle marker lamp
GB2334326B (en) * 1998-02-17 2000-01-19 Koito Mfg Co Ltd Lamp for a vehicle
FR2811407A1 (fr) 2000-07-08 2002-01-11 Hella Kg Hueck & Co Feu pour vehicules
GB2364564A (en) * 2000-07-08 2002-01-30 Hella Kg Hueck & Co Vehicle lamp with Fresnel-type reflector surface
DE10033385A1 (de) * 2000-07-08 2002-04-18 Hella Kg Hueck & Co Leuchte für Fahrzeuge
GB2364564B (en) * 2000-07-08 2004-07-21 Hella Kg Hueck & Co Lamp for vehicles
DE10033385B4 (de) * 2000-07-08 2007-05-03 Hella Kgaa Hueck & Co. Fahrzeug-Leuchte
DE10357399A1 (de) * 2003-12-06 2005-08-18 Johann & Konen Gmbh & Co Flachbauender Reflektor
DE10357399B4 (de) * 2003-12-06 2008-03-27 Johann & Konen Gmbh & Co. Kg Flachbauender Reflektor
US10697606B1 (en) 2019-07-19 2020-06-30 North American Lighting, Inc. Vehicle lamp
US10955105B2 (en) 2019-07-19 2021-03-23 North American Lighting, Inc. Vehicle lamp

Also Published As

Publication number Publication date
KR19980064217A (ko) 1998-10-07
EP0849523A3 (fr) 1999-03-10
GB9626638D0 (en) 1997-02-12
JPH10188605A (ja) 1998-07-21

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