EP0193294A2 - Signalleuchte für Fahrzeuge - Google Patents

Signalleuchte für Fahrzeuge Download PDF

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Publication number
EP0193294A2
EP0193294A2 EP86300762A EP86300762A EP0193294A2 EP 0193294 A2 EP0193294 A2 EP 0193294A2 EP 86300762 A EP86300762 A EP 86300762A EP 86300762 A EP86300762 A EP 86300762A EP 0193294 A2 EP0193294 A2 EP 0193294A2
Authority
EP
European Patent Office
Prior art keywords
light source
lamp assembly
light
prism formations
formations
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.)
Withdrawn
Application number
EP86300762A
Other languages
English (en)
French (fr)
Other versions
EP0193294A3 (de
Inventor
Nicholas William Tysoe
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
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 filed Critical Britax Vega Ltd
Publication of EP0193294A2 publication Critical patent/EP0193294A2/de
Publication of EP0193294A3 publication Critical patent/EP0193294A3/de
Withdrawn legal-status Critical Current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
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/255—Filters

Definitions

  • This invention relates to a vehicle lamp assembly of the type comprising a light source, a light transmitting outer element and a cylindrical light transmitting intermediate element disposed between the light source and the outer element with the light source on its cylinder axis and having elongate Fresnel prism formations of uniform cross section on one surface extending in respective planes perpendicular to the cylinder axis and arranged to collimate light from the light source into said planes.
  • the intermediate element also has elongate Fresnel prism formations of uniform cross section on its other surface extending in respective planes parallel to the cylinder axis, i.e. perpendicular to the first mentioned prism formations.
  • the combined effect of the two sets of prism formations is to collimate the light from the light source parallel to an optical axis through the light source and perpendicular to the cylinder axis.
  • the intermediate element is to be moulded from plastics material, the shapes of the prism formations must be such that the two halves of the mould can separate from the moulded intermediate element In other words, none of the prism formations can have undercut draw surfaces.
  • the draw surfaces are the surfaces of the prism formations interconnecting adjacent surfaces at which light is intended to be refracted). The effect of this is that some of the light from the light source will fall on to these draw surfaces and therefore not contribute to the effective output from the lamp assembly. It is an object of the invention to provide a vehicle lamp assembly which is not subject to this disadvantage.
  • said elongate Fresnel prism formations are disposed on the outer surface of the intermediate element and a second set of elongate Fresnel prism formations is formed on the outer element, said second set of prism formations being oriented parallel to the cylinder axis of the intermediate element
  • the outer element must be at a uniform distance from the cylinder axis of the intermediate element in directions peroutheasternncicular to such cylinder axis, but otherwise it may be of any convenient shape.
  • the outer element may itself serve as the cover element of the lamp assembly in which case the prism formations are preferably disposed on its inner surface. However, it will usually be preferable to provide a separate cover element outside the outer element This permits some of the prism formations to be on the outer surface and others on the inner surface thus further avoiding any risk of light from the light source being wasted by falling on a draw surface.
  • the intermediate element may be moulded from material having the colour required to be perceived when the lamp is on. Since there are no prism formations on the inside of the intermediate element, any light from outside the lamp assembly which penetrates through the intermediate element will emerge radially into the enclosure housing the light source and can be trapped by arranging for the inner surface of such enclosure to be coloured black. Perception of the colour of the intermediate element when the light source is not illuminated can be further reduced by providing ffuting on the inner surface of the cover element and whichever surface of the outer element not provided with the aforesaid Fresnel prism formations.
  • the front direction indicator lamp of a motor car consists of a housing 10 enclosed by a transparent cover element 12 having elongate flutings 13 on its inner surface.
  • the housing 10 includes a bulb holder 14 which supports a bulb 16.
  • a cylindrical intermediate element 18 of amber plastics material Located between the bulb 16 and the cover element 12 is a cylindrical intermediate element 18 of amber plastics material, the axis 20 of the cylinder passing through the filament of the bulb 6.
  • the outer surface of the intermediate element 18, i.e. the surface further from the lamp 16, carries elongate Fresnel prism formations 22 extending in respective planes perpendicular to the cylinder axis.
  • an outer element 24 consisting of two flat portions arranged at an angle to each other.
  • One portion extends perpendicular to the emergent beam of light and has elongate Fresnel prism formations 26 on its outer surfaces extending parallel to the cyclinder axis of the intermediate element 18.
  • the other portion is oriented so as to approximately bisect the angle between the light incident thereon from the intermediate element 18 and the light emergent therefrom.
  • This portion has elongate Fresnel prism formations 28 on its inner surface extending parallel to the prism formation 26.
  • the choice of surface on which to locate the prism formations 26 and 28 is made so as to minimise the amount of light falling on draw surfaces, as will be explained hereinafter.
  • -Flufings 30 and 32 are disposed on the outer element 24 on the opposite surfaces to the prism formations 26 and 28 so as to extend perpendicular to the flutings 13 on the cover element 12.
  • FIG. 3 shows a fragment of such an element 40 with a beam of light, including rays 42, 44, 46 and 48 incident on the side carrying the prism formations.
  • the emergent beam is required to be perpendicular to the plane surface of the element 40.
  • the part of the beam between the rays 42 and 44 and incident on a prism surface 50 and are deflected horizontally as illustrated.
  • the part of the beam between the rays 44 and 48, such as the ray 46, are incident on a draw surface 52. They are then internally reflected on the prism surface 50 and thence directed upwardly (as drawn) away from the main horizontal output beam.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP86300762A 1985-02-22 1986-02-05 Signalleuchte für Fahrzeuge Withdrawn EP0193294A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8504652 1985-02-22
GB8504652 1985-02-22

Publications (2)

Publication Number Publication Date
EP0193294A2 true EP0193294A2 (de) 1986-09-03
EP0193294A3 EP0193294A3 (de) 1987-08-19

Family

ID=10574941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86300762A Withdrawn EP0193294A3 (de) 1985-02-22 1986-02-05 Signalleuchte für Fahrzeuge

Country Status (1)

Country Link
EP (1) EP0193294A3 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290347A2 (de) * 1987-05-07 1988-11-09 Valeo Vision Hochleistungsleuchte, insbesondere für Kraftfahrzeuge
FR2772112A1 (fr) * 1997-12-05 1999-06-11 Valeo Vision Feu de signalisation a eclairement controle de plage eclairante, et procede de fabrication d'un ballon d'un tel feu
WO2002091039A1 (en) * 2001-05-04 2002-11-14 Honeywell, Inc. Non-planar fresnel reflector arrays, mold structures and mold patterns for eliminating negative draft during molding
FR2910857A1 (fr) * 2006-12-27 2008-07-04 Peugeot Citroen Automobiles Sa Bloc optique de vehicule automobile
CN103994386A (zh) * 2014-05-29 2014-08-20 江苏迅驰汽车部件有限公司 一种汽车后尾灯
FR3019116A1 (fr) * 2014-04-01 2015-10-02 Valeo Vision Dispositif lumineux avec ecran de deviation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1010024B (de) * 1954-05-06 1957-06-13 Bosch Gmbh Robert Leuchte, insbesondere Signalleuchte fuer Kraftfahrzeuge
DE2940866A1 (de) * 1979-10-09 1981-04-30 Westfälische Metall Industrie KG Hueck & Co, 4780 Lippstadt Fahrzeugleuchte

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1010024B (de) * 1954-05-06 1957-06-13 Bosch Gmbh Robert Leuchte, insbesondere Signalleuchte fuer Kraftfahrzeuge
DE2940866A1 (de) * 1979-10-09 1981-04-30 Westfälische Metall Industrie KG Hueck & Co, 4780 Lippstadt Fahrzeugleuchte

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290347A2 (de) * 1987-05-07 1988-11-09 Valeo Vision Hochleistungsleuchte, insbesondere für Kraftfahrzeuge
US4859043A (en) * 1987-05-07 1989-08-22 Cibie Projecteurs High efficiency signal light, in particular for a motor vehicle
EP0290347A3 (en) * 1987-05-07 1990-01-17 Valeo Vision High output signal light, especially for motor vehicles
FR2772112A1 (fr) * 1997-12-05 1999-06-11 Valeo Vision Feu de signalisation a eclairement controle de plage eclairante, et procede de fabrication d'un ballon d'un tel feu
US6231221B1 (en) 1997-12-05 2001-05-15 Valeo Vision Indicating light unit with a flux recovery and distributor mechanism disposed between a light source and an optical plate that controls illumination of the illuminating area, and a method of manufacturing the mechanism for a light unit of this kind
WO2002091039A1 (en) * 2001-05-04 2002-11-14 Honeywell, Inc. Non-planar fresnel reflector arrays, mold structures and mold patterns for eliminating negative draft during molding
US6678097B2 (en) 2001-05-04 2004-01-13 Honeywell International Inc. Non-planar fresnel reflector arrays, mold structures and mold patterns for eliminating negative draft during molding
FR2910857A1 (fr) * 2006-12-27 2008-07-04 Peugeot Citroen Automobiles Sa Bloc optique de vehicule automobile
FR3019116A1 (fr) * 2014-04-01 2015-10-02 Valeo Vision Dispositif lumineux avec ecran de deviation
EP2927050A1 (de) * 2014-04-01 2015-10-07 Valeo Vision Leuchtvorrichtung mit ablenkbildschirm
CN103994386A (zh) * 2014-05-29 2014-08-20 江苏迅驰汽车部件有限公司 一种汽车后尾灯

Also Published As

Publication number Publication date
EP0193294A3 (de) 1987-08-19

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Inventor name: TYSOE, NICHOLAS WILLIAM