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WO2001045980A2 - NARROW BEAM TAIL LIGHT - Google Patents

NARROW BEAM TAIL LIGHT Download PDF

Info

Publication number
WO2001045980A2
WO2001045980A2 PCT/NL1999/000797 NL9900797W WO0145980A2 WO 2001045980 A2 WO2001045980 A2 WO 2001045980A2 NL 9900797 W NL9900797 W NL 9900797W WO 0145980 A2 WO0145980 A2 WO 0145980A2
Authority
WO
WIPO (PCT)
Prior art keywords
lighting assembly
light source
light
safety lighting
crafts
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
PCT/NL1999/000797
Other languages
French (fr)
Inventor
Wim Hogervorst
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.)
SERVIRAD AUV
Original Assignee
SERVIRAD AUV
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 SERVIRAD AUV filed Critical SERVIRAD AUV
Priority to AU20065/00A priority Critical patent/AU2006500A/en
Priority to PCT/NL1999/000797 priority patent/WO2001045980A2/en
Publication of WO2001045980A2 publication Critical patent/WO2001045980A2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/2696—Mounting of devices using LEDs
    • 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
    • F21S41/16—Laser light sources
    • 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
    • F21S41/176—Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
    • 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
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2400/00—Special features or arrangements of exterior signal lamps for vehicles
    • B60Q2400/50—Projected symbol or information, e.g. onto the road or car body
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/30—Semiconductor lasers

Definitions

  • Tail light with narrow beam Tail light with narrow beam.
  • the present invention concerns in general warning-, marking- or safety lights on movable or stationary objects. More particularly the present invention is directed to the use of laser lights or light emitting diode lights to supplement or replace the visible light output of current lights, in particular tail lights, found on automobiles, ships, aircraft or the like, in poor visibility conditions.
  • the better detectability of current safety lights in poor visibility conditions, in particular tail lights of automobiles or other road vehicles, is obtained by using "higher power" lamps, which cause even more reduced forward-visibility when approaching a preceding vehicle, having such lights switched on, due to disturbing glare of those lamps. Since the present invention makes use of lamps with a greatly reduced light emitting beam diameter the glare of those lamps in the close vicinity of such vehicle will be greatly reduced hence improving the forward visibility of the approaching vehicle considerably. Thanks to concentrating the light output in a narrow beam the light flux in a specific direction will be relatively higher compared to that of a conventional lamp and consequently the detectability range of a preceding vehicle will be increased.
  • the present invention provides a better detectable and safer fog-tail light system compared to conventional systems with the same power consumption for air-, water- and land crafts.
  • the system can be switched on and off by the operator of the craft in the same way as with the current conventional systems.
  • the shape of the beam created by the light sourche alone or in combination with an optical sytem (mirors, condensors, lenses) is cone like.
  • the cross section of the cone preferably to be elliptical. Depending on the application the divergence of such beam has to be between 0.5° and 30° (see example in fig.l).
  • laser/LED lights can provide a divergence in that range without the use of optical means these light sources will be preferred, moreover because they produce coherent light which has a lower scatter factor compared to incandescent light.
  • laser/LED lights in the range of respectively 630 - 800 and 575 - 585 nannometer should be chosen.
  • Laser/LED lights which emit "equal energy white" light become available those should be given preference

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

The present invention provides a safety tail lighting system for use in low visibility conditions caused by fog, mist, rain, smoke, snow or other particular matter in the atmosphere. Through optical means and a conventional light source or a light source which directly produces a narrow cone- or fan-shaped beam, possibly in combination with optical means also, a narrow cone and/or fan-shaped beam of visible light is created for better detectability of a land-, sea- or aircraft and the reduction of the glare in the vicinity of the craft in such low visibility conditions. The said lighting system should preferalby use a LED (Light Emitting Diode) as light source and be capped with lamp caps commonly used for light bulbs of land crafts.

Description

DESCRIPTION
Title.
Tail light with narrow beam.
Technical field.
The present invention concerns in general warning-, marking- or safety lights on movable or stationary objects. More particularly the present invention is directed to the use of laser lights or light emitting diode lights to supplement or replace the visible light output of current lights, in particular tail lights, found on automobiles, ships, aircraft or the like, in poor visibility conditions.
Background of the invention.
The better detectability of current safety lights in poor visibility conditions, in particular tail lights of automobiles or other road vehicles, is obtained by using "higher power" lamps, which cause even more reduced forward-visibility when approaching a preceding vehicle, having such lights switched on, due to disturbing glare of those lamps. Since the present invention makes use of lamps with a greatly reduced light emitting beam diameter the glare of those lamps in the close vicinity of such vehicle will be greatly reduced hence improving the forward visibility of the approaching vehicle considerably. Thanks to concentrating the light output in a narrow beam the light flux in a specific direction will be relatively higher compared to that of a conventional lamp and consequently the detectability range of a preceding vehicle will be increased.
Detailed description of the invention.
The present invention provides a better detectable and safer fog-tail light system compared to conventional systems with the same power consumption for air-, water- and land crafts. The system can be switched on and off by the operator of the craft in the same way as with the current conventional systems. The shape of the beam created by the light sourche alone or in combination with an optical sytem (mirors, condensors, lenses) is cone like. The cross section of the cone preferably to be elliptical. Depending on the application the divergence of such beam has to be between 0.5° and 30° (see example in fig.l). Since certain types laser/LED lights can provide a divergence in that range without the use of optical means these light sources will be preferred, moreover because they produce coherent light which has a lower scatter factor compared to incandescent light. For fog-tail lights of land crafts and water crafts laser/LED lights in the range of respectively 630 - 800 and 575 - 585 nannometer should be chosen. As soon as Laser/LED lights which emit "equal energy white" light become available those should be given preference

Claims

for fog-tail lights of water crafts. The present invention can be built in a housing and be mounted as a stand alone unit at a craft or preferably be combined with a lamp cap commonly used in land crafts and automobiles in particular and known as type BA15. Also a laser- or LED light source could be combined with the normal incandescent BA15 capped light source either outside or inside the glass bulb. If required the present invention will be provided with a voltage converter in order to adapt to typical voltages used in air-, water- and land crafts.Claims .
1. A safety lighting assembly for use in low visibility conditions caused by fog, mist, rain, snow, smoke or other particular matter in the atmosphere, comprising: a cone- or fan beam shaping light source assembly, preferably emitting substantially coherent light in the visible spectrum when electrically energized and the beam of which has a divergence of between 0.5° and 30° with preferably an ellips like- or fan beam cross section, whereby said beam is visible to the naked eye equally well or better than the commonly available fog-tail lights under said poor conditions of the atmosphere.
2. The safety lighting assembly of claim 1, wherein said light source comprises a laser diode light source, emitting substantially coherent light with a wavelenght in the range of 630 to 800 nannometer.
3. The safety lighting assembly of claim 2, emitting in the range of 575 to 585 nannometer.
4. The safety lighting assembly of claim 2 or 3 provided with optical means in order to to create a certain beam shape.
5. The safety lighting assembly of claim 2 thr. 4, wherein said light source comprises a LED (Light Emmitting Diode) .
6. The safety lighting assembly of claim 5, wherein said light source comprises a LED emitting an aggregate of wave- lenghts between 350 and 800 nannometer resulting in white light of which the combination of wavelenghts approaches the point E of the colour triangle (known as "equal energy white") as much as possible.
7. The safety lighting assembly of claim 1, wherein said lightsource comprises an incandescent light source and optical means to create the said light beam.
8. The lighting assembly of claim 1 through 7 being adequately capped to fit into the regular fittings of tail lights of air-, water- and land crafts.
9. The safety lighting assembly of claim 1 thr. 8 mounted in a housing one side of which is provided with transparent blanc or coloured material such as perspex or plastic and in which the safety lighting assembly will be mounted such that the emanating beam of the lighting assembly passes the transparent side more or less perpendicularly.
PCT/NL1999/000797 1999-12-22 1999-12-22 NARROW BEAM TAIL LIGHT Ceased WO2001045980A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU20065/00A AU2006500A (en) 1999-12-22 1999-12-22 Tail light with narrow beam
PCT/NL1999/000797 WO2001045980A2 (en) 1999-12-22 1999-12-22 NARROW BEAM TAIL LIGHT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NL1999/000797 WO2001045980A2 (en) 1999-12-22 1999-12-22 NARROW BEAM TAIL LIGHT

Publications (1)

Publication Number Publication Date
WO2001045980A2 true WO2001045980A2 (en) 2001-06-28

Family

ID=19866629

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1999/000797 Ceased WO2001045980A2 (en) 1999-12-22 1999-12-22 NARROW BEAM TAIL LIGHT

Country Status (2)

Country Link
AU (1) AU2006500A (en)
WO (1) WO2001045980A2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004002779A1 (en) * 2002-07-01 2004-01-08 Meridiana Investimenti Sagl Emergency optical signalling device
EP1447246A3 (en) * 2003-02-11 2004-10-27 Continental Aktiengesellschaft System in a vehicle for transmitting a signal from the trailer to the tractor of the vehicle
US9285531B2 (en) 2008-08-08 2016-03-15 3M Innovative Properties Company Lightguide having a viscoelastic layer for managing light
US10228507B2 (en) 2008-07-10 2019-03-12 3M Innovative Properties Company Light source and optical article including viscoelastic lightguide disposed on a substrate

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004002779A1 (en) * 2002-07-01 2004-01-08 Meridiana Investimenti Sagl Emergency optical signalling device
US7404653B2 (en) 2002-07-01 2008-07-29 Meridiana Investmenti Sagl Emergency optical signalling device
EP1447246A3 (en) * 2003-02-11 2004-10-27 Continental Aktiengesellschaft System in a vehicle for transmitting a signal from the trailer to the tractor of the vehicle
US10228507B2 (en) 2008-07-10 2019-03-12 3M Innovative Properties Company Light source and optical article including viscoelastic lightguide disposed on a substrate
US9285531B2 (en) 2008-08-08 2016-03-15 3M Innovative Properties Company Lightguide having a viscoelastic layer for managing light

Also Published As

Publication number Publication date
AU2006500A (en) 2001-07-03

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