WO2002075205A2 - Appareils d'eclairage - Google Patents

Appareils d'eclairage Download PDF

Info

Publication number
WO2002075205A2
WO2002075205A2 PCT/GB2002/001340 GB0201340W WO02075205A2 WO 2002075205 A2 WO2002075205 A2 WO 2002075205A2 GB 0201340 W GB0201340 W GB 0201340W WO 02075205 A2 WO02075205 A2 WO 02075205A2
Authority
WO
WIPO (PCT)
Prior art keywords
light
fitting
fitting according
luminescent material
light fitting
Prior art date
Application number
PCT/GB2002/001340
Other languages
English (en)
Other versions
WO2002075205A3 (fr
Inventor
Craig Jameson Baillie
Stephen Lambert
Original Assignee
Craig Jameson Baillie
Stephen Lambert
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 Craig Jameson Baillie, Stephen Lambert filed Critical Craig Jameson Baillie
Priority to AU2002251183A priority Critical patent/AU2002251183A1/en
Publication of WO2002075205A2 publication Critical patent/WO2002075205A2/fr
Publication of WO2002075205A3 publication Critical patent/WO2002075205A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K2/00—Non-electric light sources using luminescence; Light sources using electrochemiluminescence
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V1/00—Shades for light sources, i.e. lampshades for table, floor, wall or ceiling lamps
    • F21V1/14—Covers for frames; Frameless shades
    • F21V1/16—Covers for frames; Frameless shades characterised by the material
    • F21V1/17—Covers for frames; Frameless shades characterised by the material the material comprising photoluminescent substances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/08—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material comprising photoluminescent substances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings

Definitions

  • the present invention relates to light fittings .
  • Known light fittings by which is meant fixtures, fittings and parts associated with an artificial light source, generally serve either a structural function, in mounting and supporting the light source, a safety function, by preventing people from getting too close to the light source, or an aesthetic function, in improving the appearance of the light source. Fittings are not generally used to provide any type of illumination in themselves.
  • emergency lighting which typically provides a low level of illumination, is required to come on immediately if regular lighting goes out in the event of a power failure or if the regular lighting has to be extinguished for reasons of safety.
  • existing emergency lighting systems tend to be powered by electricity, either from the mains, from emergency back-up generators or by battery. They are thus disadvantageous in that operation of them may become either difficult, impossible or dangerous, depending on the circumstances in which the regular lighting was extinguished.
  • Night lights are a further example of the provision of low level illumination.
  • Known night lights include small electrical units which plug directly into a standard mains socket and give out a dim light. Therefore, they consume electricity, and cannot be used in the event of a power failure .
  • the present invention seeks to alleviate the aforementioned disadvantages. Accordingly, the present invention is directed to a light fitting for mounting in proximity to an associated artificial light source, the fitting comprising luminescent material which, in use, is charged by light emitted from the light source so that the fitting produces a glow when the artificial light source is extinguished.
  • the invention therefore provides a light source which operates immediately in the event of the artificial light being extinguished, without the need for electrical power and without the need for the switching on or operating of any device.
  • the fitting can be discrete so that it forms an integral part of the existing artificial light installation without detracting from the appearance of the installation.
  • the fitting is made from rubber, glass or a plastics material and the luminescent material is incorporated within the matrix of the fitting material.
  • the luminous characteristic of the fitting is hence provided in a robust way, which is not liable to wear, or damage.
  • the luminescent material is provided in a coating applied to the surface of . the fitting.
  • the luminescent material is provided in a an adhesive tape applied to the surface of the fitting.
  • the luminescent material comprises a rare earth metal.
  • the rare earth metal is preferably europium or dysprosium.
  • the luminescent material further comprises an alkaline earth metal, which is preferably strontium.
  • the fitting further comprises a colourant material.
  • the colourant material is a pigment.
  • the pigment is provided in a polyamide co-condensate carrier which is compatible with rubber or plastics materials.
  • the colourant material may be incorporated into the matrix of the fitting material, or alternatively, may be provided as a coating applied to the surface of the fitting.
  • Luminous materials commonly have an unpleasant dull greenish hue, so the present invention seeks to overcome this by providing a colourant which does not interfere with the action of the luminous material, i.e. which does not unduly absorb either incoming light for charging the luminous material or the light given off by the luminous material.
  • the fitting can be made in any colour which is required.
  • the colourant material imparts a white colour to the fitting.
  • Many known light fittings and fixtures are white or partly white, so use of a white colourant in the fitting gives a fitting which harmonises well with existing light installations.
  • the colorant material is stable up to 250 °C.
  • the colourant material is light-fast and stable to ultra-violet light.
  • the coating or coatings are stable up to 250 °C.
  • the fitting is retardant against fire. This is an important feature, given that the fitting is exposed to the high temperatures of artificial light sources.
  • fittings made according to the present invention will now be described.
  • the terms "light fitting” and “fitting” are to be understood to cover all parts, fittings and attachments normally used in conjunction with artificial lights, or parts, fittings and attachments adapted for use therewith.
  • the terms are intended to include, among other things, light shades and lamp shades, light diffusers, light reflectors, light bulbs, light tubes including fluorescent light tubes, covers of light sources, backing panels of lamps, ceiling or wall light mounting fixtures, both decorative and functional, such as rosettes, lamp sockets, strip light holders, strip light protective sleeves, and components of torches and other portable light sources.
  • Such fittings can be made in the known manner, with an additional step of providing luminescent material in accordance with the present invention.
  • the fitting is provided with means suitable for mounting it in the vicinity of an artificial light source.
  • the nature of the mounting means depends on the function which the fitting is intended to play.
  • the fitting is formed from glass, rubbers, plastics or metal materials. In this way, a wide variety of fittings can be made, as the use of glass allows for the production of light bulbs and light tubes, and plastics (particularly thermoplastics and thermosetting plastics), metals and rubbers (both synthetic and natural) can be used to produce many fixtures and fittings for the mounting of light bulbs and light tubes, and also can be incorporated into lamp shades, .light covers and protectors and the like.
  • suitable materials include acrylics, polyolefins such as high or low density polypropylene, polyethyleneterephthalate, polystyrene, ABS, polycarbonate, phenolics, ureas, melamines, nylon 6 and nylon 66.
  • any known luminescent material which is capable of being in some way incorporated with the fitting is suitable for the present invention.
  • the preferred embodiment uses rare earth metals as the luminescent material.
  • Europium or dysprosium are particularly suitable, and can be used in the form of the metal or as an oxide or aluminate thereof.
  • a luminescent material based on rare earth metals can be improved by the addition of alkaline earth metals. Strontium and its oxides and aluminates are especially suitable.
  • the luminescent material is comprised within the fitting in one or more of several ways .
  • the preferred method is to form the fitting from a glass, rubber or plastic matrix material, which has the luminescent material dispersed within it. This gives a durable fitting with a long-lasting luminous quality, because to luminescent material is not liable to wear and tear.
  • the matrix material should preferably be of a high clarity, both to allow transmission of light from an artificial light source to charge the luminescent material, and to give good transmission of glow light subsequently emitted by the luminescent material.
  • the luminescent material can be added to a pre-formed fitting by covering the fitting with a layer, film or coating of a medium which contains the luminescent material.
  • This approach allows for a wider range of materials to be used to make the fitting, for example metals, which not suited to the dispersion of the luminescent material within them.
  • existing fitting manufacturing processes can be easily adapted to produce fittings according to the present invention, by the addition of a coating step at the end of manufacture.
  • the coating should be stable up to 250 °C, so that it does not degrade through use.
  • the exposure to heat is also be advantageous, because the intensity of the luminous glow emitted by some luminescent materials increase if the material is heated, although the longevity of the glow is lessened.
  • the luminescent material can be chosen to provide a brighter and short-lived glow, or a dimmer and more prolonged glow, depending on the intended purpose of the fitting.
  • a further method of providing the fitting with luminescent material is. very simple, and suited to many fittings, made of any material, and even to non-luminous fittings already in use.
  • Luminescent material can be incorporated into self-adhesive tape, or possible heat- bonded tape, which is then quickly and simply applied to the fitting.
  • the fitting is retardant against fire. This is not essential, but makes for a safer fitting, given that the fitting is exposed to high levels of heat in the neighbourhood of the artificial light source.
  • a further embodiment of the present invention relates to a fitting as described above, but further comprising a colourant material.
  • a colourant material This is used to give a desirable and/or appropriate colour to the fitting, in place of the typical dull dirty green colour common in luminous and phosphorescent materials.
  • the colourant imparts a. white colour to the fitting. This makes the fitting entirely suitable for use with most existing light fixtures, which are commonly made from white plastics materials .
  • Pigment colourants are preferred, and are provided in a polyamide co-condensate carrier which is added, along with the luminescent material, to the matrix material from which the fitting is to be made.
  • the carrier makes the colourant compatible with rubber and plastics materials .
  • the colourant can be provided in this way, by adding it to the fitting material, or can be provided as a coating applied to the surface of the fitting.
  • the coating material should be stable up to
  • the colorant itself should be stable up to the same temperature, for the same reason. Additionally, the colourant should be light fast and stable to ultra-violet light, so that the colour of the fitting does not degrade with prolonged exposure to the artificial light .
  • An especially preferred embodiment of the present invention is a fitting made from the improved luminous materials described in our co-pending application for "Improved luminous materials".
  • these materials comprise a rubber, glass or plastics material matrix, a luminescent material dispersed throughout the matrix, and a colourant dispersed throughout the matrix, the colourant giving the matrix a colour when it is observed under substantially white light, and the colourant allowing substantial transmission of light emitted by the luminous material.
  • the materials have both the properties of high visibility, owing to the colourant, and high luminosity, thanks to the colourant not acting to quench the glow of the luminous material.
  • the property of high visibility of these materials is not essential, because it is desirable for them to blend in to existing surroundings and appear to be nothing more than a conventional light fitting.
  • one embodiment of these materials uses colourants which give white colour to the material, and this is very well-suited to the present invention, as so many light fittings are conventionally white.
  • the other embodiments of the improved materials are also suitable, however, and use of them falls within the scope of the present invention.
  • the white material is based on a high clarity engineering grade polymer material matrix, suitable polymers including polyurethane, co-polymers of styrene and butadiene, polyolefins, acrylic, ABS, polyethyleneterephthalate, polycarbons, PC-ABS alloys, polyethylene butyl tersthylene, modified polypropylene, PET, and most preferably, polyamides .
  • Luminescent materials comprising rare earth metals and alkaline earth metals as described above are used, and the white colourant is a pigment, comprising one or more of titanium dioxide, calcium carbonate, silicon dioxide, or other translucent white colourants. A combination of titanium dioxide and silicon dioxide is preferred.
  • the fitting requires it to be mounted in the vicinity of the artificial light source from which it is going to be charged. A proximity of not more than 30 cm is preferred.
  • the method of mounting will depend on the type of fitting, for example, fastening a lamp shade around a light bulb in the known manner.
  • the mounting is the connection of the fitting into sockets and the like to provide the required electrical connection, also in the known manner.
  • the luminescent material in the fitting absorbs part of the light emitted by the artificial light source when the light source is illuminated, and is hence charged. When the light source is extinguished, the luminescent material emits a luminous glow, so that the fitting "glows in the dark".
  • a fitting will provide immediate emergency lighting in the event of a power failure, without the need to operate any switches, or other human intervention.
  • a fitting provides a convenient alternative light source if electrical lighting needs to be extinguished for reasons of safety or power conservation.
  • a fitting can be used as a night light, as it will provide a low level of illumination after its associated artificial light is turned off, giving increased security and safety to persons in the vicinity.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Luminescent Compositions (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Abstract

La présente invention concerne un appareil d'éclairage qui est destiné à être installé à proximité d'une source de lumière artificielle associée, l'appareil comprenant un matériau luminescent qui, en utilisation, est chargé par la lumière émise par la source de lumière de telle manière que l'appareil produise une lueur luminescente lorsque la source de lumière artificielle est éteinte.
PCT/GB2002/001340 2001-03-21 2002-03-21 Appareils d'eclairage WO2002075205A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002251183A AU2002251183A1 (en) 2001-03-21 2002-03-21 Light fittings

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0107077.0A GB0107077D0 (en) 2001-03-21 2001-03-21 Light fittings
GB0107077.0 2001-03-21

Publications (2)

Publication Number Publication Date
WO2002075205A2 true WO2002075205A2 (fr) 2002-09-26
WO2002075205A3 WO2002075205A3 (fr) 2003-03-13

Family

ID=9911255

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/001340 WO2002075205A2 (fr) 2001-03-21 2002-03-21 Appareils d'eclairage

Country Status (3)

Country Link
AU (1) AU2002251183A1 (fr)
GB (1) GB0107077D0 (fr)
WO (1) WO2002075205A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003102464A1 (fr) * 2002-06-04 2003-12-11 Luna Glow Pty Ltd Protege-lampe ou revetement phosphorescent
NL1029664C2 (nl) * 2005-08-02 2007-02-05 Next Generation B V Lichtgevende lamp die niet meer uit gaat met behulp van foto lichtgevende pigmenten.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161388A (en) * 1977-03-17 1979-07-17 Gte Sylvania Incorporated Signal device having prolonged illumination means
US4245282A (en) * 1979-06-25 1981-01-13 Sokol Peter L Illuminating device
US4481560A (en) * 1982-07-29 1984-11-06 Nambang Corporation Safety lamp with noctilucent lens holder
DE8913541U1 (de) * 1989-11-16 1990-01-11 Frankauer, Manfred, 4350 Recklinghausen Leuchte für den Grubenbetrieb
US5757111A (en) * 1995-04-03 1998-05-26 Sato; Giichiro Night light with phosphorescent element
ES1038638Y (es) * 1997-10-31 1999-01-01 Matarrodona Martinez Jorge Lampara perfeccionada.

Non-Patent Citations (1)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003102464A1 (fr) * 2002-06-04 2003-12-11 Luna Glow Pty Ltd Protege-lampe ou revetement phosphorescent
NL1029664C2 (nl) * 2005-08-02 2007-02-05 Next Generation B V Lichtgevende lamp die niet meer uit gaat met behulp van foto lichtgevende pigmenten.

Also Published As

Publication number Publication date
AU2002251183A1 (en) 2002-10-03
GB0107077D0 (en) 2001-05-09
WO2002075205A3 (fr) 2003-03-13

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