WO1989011713A1 - Luminaires pour panneaux indicateurs - Google Patents

Luminaires pour panneaux indicateurs Download PDF

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Publication number
WO1989011713A1
WO1989011713A1 PCT/AU1989/000223 AU8900223W WO8911713A1 WO 1989011713 A1 WO1989011713 A1 WO 1989011713A1 AU 8900223 W AU8900223 W AU 8900223W WO 8911713 A1 WO8911713 A1 WO 8911713A1
Authority
WO
WIPO (PCT)
Prior art keywords
planar
assembly
planar material
source
light
Prior art date
Application number
PCT/AU1989/000223
Other languages
English (en)
Inventor
David Robin Bean
John Brown
Original Assignee
Stanilite Pacific 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 Stanilite Pacific Ltd. filed Critical Stanilite Pacific Ltd.
Publication of WO1989011713A1 publication Critical patent/WO1989011713A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/007—Incandescent lamp or gas discharge lamp
    • G02B6/0071—Incandescent lamp or gas discharge lamp with elongated shape, e.g. tube
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/18—Edge-illuminated signs
    • G09F2013/1804—Achieving homogeneous illumination
    • G09F2013/1827—Prismatic window

Definitions

  • the present invention relates to a luminaire assembly for signs and the like. More particularly the present invention relates to luminaire assemblies for signs and the like which are of the internally illuminated, edge lit type.
  • Figures 1 and 2 show two types of such prior art signs.
  • Figure 1 shows the particular variety known as internally illuminated, back lit.
  • a light source is located immediately behind an at least semi-transparent sign 2 having relatively opaque indicia 3 marked thereon (or vice versa).
  • the light or lights 4 are arranged to shine through the sheeting thereby resulting in the indicia 3 being clearly visible to an outsider observer by virtue of differences in the transmission of the light from the light sources 4 through the sign backing material 2 and the indicia 3.
  • This form of assembly typically provides the illumination characteri sti cs requi red for emergency si gns and the l i ke as spec i fi ed i n Australian Standard AS 2293.1 (1987), particularly Section 2.5.
  • Such assemblies are, however, relatively bulky.
  • This type of sign comprises a generally clear sheet of material 5 having a strip light source 6 arranged to shine light through at least one edge surface of the sheet.
  • the sheet 5 has sunken, etched letters 7 engraved into a front face, the cross-section of the etching being more clearly shown in section AA of Figure 2.
  • the light from the light source 6 is refracted through at least the front surface of the sign 5 in such a way that the edges of the lettering 7 tend to exhibit more luminance than other portions of the lettering.
  • a uniformly coloured backing sheet 8 having stenciled thereon a minic of the indicia 7 whereby, when viewed from the front of the sign 5, the observer can also view light reflected from the indicia on the coloured backing sheet 8.
  • the clear sheet 5 is typically commercially available planar acrylic sheeting or the like, which sheeting has parallel front and rear faces and which sheeting is merely cut to size or equivalent by the sign manufacturer or plastic supplier/manufacturer.
  • the etching of the indicia 7 is subsequently added as an additional manufacturing step", the major area of the sunken surface (generally designated 9) being relatively smooth. This form of internally illuminated, edge lit sign tends to exhibit a non-uniform luminance to the observer when viewed from the front.
  • the luminance is greater near the top of the sign (closest to the light source) and least at the bottom of the sign (furthest from the light source). This variability in luminance is undesirable particularly when the ratio of luminance of the brightest point of the background compared with the darkest point of the background exceeds acceptable limits. Furthermore whilst this form of construction allows considerable contrast at the edges of the lettering 7 as compared with the background luminance the high contrast does not extend uniformly across and within all of the lettering.
  • AUA54158/79 discloses the general idea of roughening a face of a light transmitting planar material, the roughened face being opposite that face of the material through which light is ultimately to be transmitted to viewers.
  • the construction of embodiments of the present invention differ in detail from that disclosed in the PLUMLY citation and also result in an improved illuminated sign arrangement, particularly in the context of exit signs used under emergency conditions and in the context of satisfying AS2293.1 (1987).
  • the text of AUA54158/79 is incorporated herein by cross reference.
  • the text of the United States Patents listed on page 2 of AUA54158/79 is also incorporated herein by cross reference.
  • Australian Standard AS 2293.1 (1987) is specifically directed at requiring uniform luminance of the lettering, uniform luminance of the background surrounding the lettering (for a predetermined distance around the' lettering) and for ensuring a minimum contrast between the luminance levels of the lettering and of the background.
  • an internally illuminated, edge lit sign assembly comprising a source of strip illumination; a planar material capable of internally passing light emitted from said source of strip illumination; said planar material being of essentially uniform composition throughout and having front and rear planar faces; said planar faces bounded by an edge surface at least a portion of which edge surface is adapted to receive light emitted from said source of strip illumination, at least a portion of the light emitted from said source of strip illumination being disbrimped within said planar material; said planar material having a refractive index greater than that of the light transmitting medium in which it is immersed; an indicia volume (indicia-shaped in the plane of said planar material) having means entrapped within said volume for refracting or reflecting (or a combination of
  • said indicia volume is constituted by the application of a light transmitting material to said rear surface; said light transmitting material having entrapped within it randomly oriented particles; said particles having a refractive index different from said light transmitting material.
  • said particles have a refractive index greater than that of the volume in which they are immersed, which volume itself has a refractive index which is greater than that of said planar material).
  • said light transmitting material is applied to said from surface instead of said rear surface or in addition to being applied to said rear surface.
  • said light transmitting material is located within said planar material.
  • said indicia volume is constituted by finely etched markings being inscribed into said rear surface of said planar material.
  • said light transmitting material is effected by "doping" of said rear surface of said planar material in order to achieve an indicia volume with a different refractive index or opaqueness as compared with that of said planar material.
  • planar material Preferably all external dimensions of said planar material are much greater than the wavelength of light emitted by said source of strip illumination.
  • said source of strip illumination is located externally adjacent at least a portion of said edge surface and arranged so that light from said source of strip illumination is directed through said portion of said edge surface and into said planar material substantially in one general direction.
  • said external light transmitting medium is air.
  • said planar material comprises acrylic plastic, clear plastic ploycarbonate, plexiglass and the like.
  • edge surfaces comprise a top edge surface, first and second opposed side edges and a bottom edge.
  • said source of strip illumination is externally adjacent to and extends substantially the length of said top edge surface whereby light from said source of strip illumination is directed into said planar material through said top edge surface and substantially in the direction of said bottom edge.
  • Preferably said front and said rear planar faces are not parallel.
  • said front and said rear planar faces taper continuously closer together in the general direction of said light rays.
  • the angle of said taper is an internal angle in the range 1° - 30°. More preferably the internal angle range is 1° - 5o. Most preferably the angle is approximately 2°.
  • planar material is of width approximately 400mm, height approximately 175mm and has a top edge surface depth of approximately 9mm and a bottom edge depth of approximately 2mm.
  • said indicia volume comprises a roughened area inscribed on said rear surface of said planar material which when viewed from said front planar face by an observer located in said light transmitting medium in which said planar material is immersed forms intelligible markings; said roughened area comprising irregularities in said rear surface whereby the directions of internal reflection of said light upon striking said irregularities is randomised resulting in at least portions of said light immediately following so striking irregularities being passed forwardly through said front surface thereby resulting in a relatively higher proportion of said light emerging from said front surface at those locations than would otherwise be the case.
  • said sign assembly also includes an opaque planar backing sheet having a first planar face adapted to be placed against or in close juxtaposition with said rear face of said planar material, said first planar face having inscribed thereon uniformly coloured indicia areas of contrasting colour as compared to said uniform background colour, said uniformly coloured indicia areas appearing to an observer as intelligible markings when viewed through said planar material from said front surface of said planar material.
  • said uniformly coloured indicia areas are co-extensive with and mirror said roughened area on said rear surface of said planar material when the two are placed against each other or are in close juxtaposition.
  • said uniformly coloured indicia areas themselves comprise roughened raised surfaces relative to said uniform background colour whereby light refracted out of said rear surface is randomly scattered by said roughened raised surface and at least portions of the randomly scattered light are reflected generally perpendicularly back into said planar material through said rear surface at such an angle that said light continues through said planar material and is immediately refracted out of said front surface of said planar material rather than being internally reflected thereby resulting in increased perceived relative luminance of said indicia when viewed by an observer from said front surface of said planar material.
  • an internally illuminated, edge lit sign assembly comprising a source of strip illumination; a planar material capable of internally passing light emitted from said source of strip illumination; said planar material being of essentially uniform composition throughout and having front and rear planar faces; said planar faces bounded by an edge surface at least a portion of which edge surface is adapted to receive light emitted from said source of strip illumination, at least a portion of the light emitted from said source of strip illumination being distributed within said planar material; said planar material having a refractive index greater than that of the light transmitting medium in which it is immersed; said front and said rear planar faces being not parallel, said front and said rear planar faces tapering continuously closer together in the general direction of said light rays.
  • the angle of said taper is an internal angle in the range 1o - 30o . More preferably the internal angle range is 1° - 5°. Most preferably the angle is approximately 2°.
  • said indicia volume comprises the bulk of said planar material leaving only unmodified portions of either the rear face, from face or regions sandwiched therebetween appearing as intelligible indicia to an observer viewing said front face of said planar material.
  • Figure 1 discloses a prior art internally illuminated, back lit sign
  • Figure 2 discloses a prior art internally illuminated, edge lit sign
  • FIG. 3 shows diagramatically some of the possible principles of operation of aspects of the present invention
  • Figure 4 discloses a first embodiment of the present invention
  • Figure 5 discloses a second embodiment of the present invention
  • Figure 6 discloses a third embodiment of the present invention
  • Figure 7 discloses a fourth embodiment of the present invention
  • Figure 8A shows a perspective view of a fifth embodiment
  • Figure 8B shows a right side view of a fifth embodiment
  • Figure 8C shows view of the liminaire housing assembly of the fifth embodiment
  • Figure 8D shows a left end view of the clear planar material which forms the facia of the fifth embodiment
  • Figure 8E shows a right end view of the planar material of the fifth embodiment
  • Figure 8F shows a front view of the planar material and a section through the planar material of the fifth embodiment.
  • Figure 9 discloses alternative light source arrangements relative to the planar material.
  • Figure 10 discloses an arrangement used for the 6th to 11th embodiments of the invention.
  • FIG. 3 there is shown the behaviour of light rays trapped within a medium, which medium has non-parallel boundary surfaces.
  • the angled boundary surfaces mean that the angle of incidence of the internal ray as it strikes consecutive internal boundary surfaces is continually changing thereby allowing for the possibility that, eventually, the angle of incidence will be such that the ray is at least partially refracted through the boundary surface to the external medium rather than being entirely internally reflected from the internal boundary wall. It is hypothesised that this angled boundary wall structure allows for an even, uniform escape of light rays from all portions of the boundary walls of the medium in which the light ray is initially trapped.
  • Section BB in Figure 3 also shows that, proportionately, the number of light rays emerging from a given area of the medium can be increased by roughening the boundary surface in that area whereby there is an increased likelihood that a ray will strike the roughened surface at a critical angle which allows the light ray to escape from the medium.
  • the roughened surface 10 is a treated surface which is di stringui shed from the surrounding area 12 in that, when viewed from a distance, the light reflected from the roughened surface represents intelligible indicia to an observer.
  • FIG. 4 there is shown a first embodiment of the present invention. Specifically there is shown a luminaire for and including a sign comrpising, essentially, a planar backing sheet 13 having a first face 14.
  • the first face 14 faces a rear face 19 of a planar material 12.
  • the planar material 12 has, in addition to the rear face 19, a front face 18, a top edge 16, a bottom edge 17, a first side edge 20 and a second side edge 21.
  • a source of strip illumination 15 is located generally above the top edge 16 and arranged to inject light rays from the light source into the top edge 16 whereby the light rays enter the interior of the planar material 12.
  • the first face 14 of the planar backing sheet 12 is maintained essentially against the rear face 19 of the planar material 12.
  • Intelligible information is communicated to an observer facing the front face 18 of the planar material 12 as follows:
  • the desired information is the word "EXIT”.
  • the message is communicated by firstly marking the letters "EXIT” in mirror form as a roughened area on the rear face 19 of the planar material.
  • the roughened surface can be created by any suitable means which provides a finely roughened texture. This can include surface etching (chemical or mechanical), sanding, sand blasting and the like.
  • the important feature in the roughened surface is that it includes variations in the rear surface plane of the rear face 19 which presents a variety of angles of incidence to internally incident light rays whereby an increased proportion of light rays per unit area of incidence strike at angles which cause the incident rays to be at least partially refracted through the rear face and a further proportion of rays per same unit area to be internally reflected in the direction of the front face 18 than would otherwise be the case it the roughening was not there.
  • the first face 14 of the planar backing sheet 13 has marked thereon indicia 22 against a uniform background 23.
  • the indicia 22 are coextensive in area with the mirror indicia comprising the roughened area on the rear face 19 of the planar material 12.
  • the indicia 22 comprise white painted letters on a green background 23.
  • the white letters 22 form the word "EXIT" and when the backing sheet 13 is appropriately placed against the rear face 19 of the planar material 12 the white lettering 22 is visible to a viewer viewing through the front face 18, the white lettering being coextensive with the roughened area of the rear face 19 so that It is not obvious to the observer that the lettering is the result of light returning from two planes (the plane of the rear face 19 and the plane of the first face 14).
  • the cross-section of the planar material 12 parallel to either the first side edge 20 or the second side edge 21 is of right triangular shape.
  • the right triangular cross-section of the planar material 12 combined with the roughened area on the rear face 19 when exposed to light rays injected through the top edge 16 as shown from light source 15 produce an image of the indicia when viewed from the front face 18 which satisfies the requirements of Australian Standard AS 2293, Part 1 (1987), particularly clauses 2.5.2, 2.5.4.1 and 2.5.4.2.
  • the double sided version of the first embodiment is simply an assembly incorporating a second planar backing sheet and a second planar material arranged "back to back" against the planar backing sheet 13 and planar material 12 shown in Figure 4.
  • the light source 15 is placed symmetrically across the top of the fitting the single light source can be used to inject light into both planar material components (refer fifth embodiment).
  • the sign is of dimensions as shown in Figure 2.3 of page 17 of AS 2293.1 (1987) ie a "24 metre" sign.
  • the uniformity of luminance and contrast of luminance characteristics required for the exacting task of emergency exit sign lighting were met by this first embodiment.
  • the planar material of the first embodiment comprises commercially available moulded acrylic material.
  • the backing sheet is formed from cardboard, stiff pager, opaque plastic or the like.
  • the source of strip illumination 15' is a 10 watt "cool white" (4200°K) 26mm diameter tubular fluorescent light tube. Where less exacting requirements are placed on the luminaire for signs ie the lighting uniformity and contrast requirements can be somewhat relaxed as compared with AS 2293-1 (1987) then luminaires can be produced which adopt only some of the features which provide the desired uniformity and contrast.
  • the second, third and fourth embodiments illustrate exemplary alternative arrangements.
  • FIG. 5 there is shown a second embodiment of construction generally similar to that of the first embodiment of Figure 4 save that the right triangular cross-section for the planar material has not bee adopted. Rather the front and rear faces of the planar material are parallel.
  • the roughened texture of the rear surface of the planar material is sufficient to provide an improved uniformly luminant indicia as viewed from the front face of the planar material although not necessarily to the standard of AS 2293-1.
  • THIRD EMBODIMENT Referring to Figure 6 there is shown a third embodiment where the right triangular cross-section of the planar material is adopted thereby providing uniform luminance across the entire from face of the planar material. However no etching or other surface roughening has been carried out to form indicia on the rear face of the planar material.
  • the indicia applied to the backing sheet 13 form the only means of creating intelligible indicia to a viewer when viewing the assembly from the front face of the planar material 12.
  • FIG. 7 a fourth embodiment is shown similar in construction to that of embodiment 3 of Figure 6 save that the indicia 22 on the first base 14 of the backing sheet 13 comprise a raised and roughened surface relative to the background 23 of the first face 14.
  • the third and fourth embodiments when illuminated as illustrated by the source of strip illumination 15 provide a relatively improved uniform background illuminance behaviour over the whole of the from surface area of the sign although again not necessarily to quite the rigorous standard required by AS 2293-1.
  • FIG. 8A and 8F there is shown a fifth embodiment of the present invention, which embodiment is very similar 1n construction to that of the first embodiment save that two portions of planar material have been placed back to back in order to form a double sided sign, the two portions of planar material being anchored within a top housing, which housing also contains the source of strip illumination for the fifth embodiment.
  • a specific ridging portion 30 is molded Integrally as part of the planar material, which ridge portion is used to anchor the back to back planar material portions within the slot portion 31 of the strip light source housing 32.
  • the relative dimensions of the embodiment are shown marked on the drawings.
  • the sixth embodiment provides a double sided sign whose lighting characteristics relating to contrast of the message against the background together with evenness and adequacy of background illumination are improved over the first to fifth embodiments described above.
  • the sign is shown in diagramatic form and comprises a first planar material 30 of right triangular cross section together with a second planar material 31 also of right triangular cross section, these two components, as shown in Figure 10, noted in opposed relationship with a legend plate 32 interposed therebetween.
  • the legend plate 32 has a legend printed on both sides 37, 38, which legend coincides with the legend silk screened onto the rear faces 33, 34 of the planar materials when the whole assembly is aligned.
  • the sixth embodiment can be varied by additionally coating the balance of the rear surfaces 33, 34 with fine droplets of a transparent or translucent green medium thereby giving a "frosted” effect which thereby increased the apparent level of luminence of the background, green areas.
  • SEVENTH EMBODIMENT This embodiment is essentially as described for the sixth embodiment with reference to Figure 10 except that the rear surface 33, 34 of the planar material (other than that part covered by the legend) is covered with either an applied pigment or very fine etching (either mechanical or chemical etching), thereby providing an alternative means of achieving uniform background illumination.
  • the legend is applied to the front (viewing) surfaces 35, 36 of the planar material by the same processes as described in embodiments six and seven.
  • the application of the legend to these front faces can be either as an alternative to or in addition to the legend applied to the rear faces 33,
  • this embodiment is conceptually the same as that of the sixth, seventh and ninth embodiments save that, in addition, a metal cover plate or an applied opaque coating is applied thereby masking the background field.
  • the lettering can be coloured by means of use of a coloured legend plate or by use of an appropriately coloured opaque or translucent coating on the rear surface or an appropriately coloured translucent coating on the front surface of the two planar material portions 30, 31.
  • a reflective strip can be applied to a lower edge surface of the sign assembly whereby light is reflected back, upwardly into the planar material into which light is initially injected by the light source.
  • Figure 9 shows some alternative arrangements of light sources relative to the planar material.
  • CLIENT STANILITE PACIFIC. LTD.
  • ADDRESS P.O. BOX 182, AUBURN. NSW. 2144
  • CONTACT Mr. W. MacDouall .
  • MANUFACTURER STANILITE PACIFIC LTD.
  • TYPE Edge Lit EXIT SIGN, Single Sided, Series 2000/110/S.
  • test voltage was 88V DC being 80% of the 110V DC central system in accordance with the requirements of Clause A2.4. Test Voltage of AS2293, Part 1.
  • TEST INSTRUMENT The equipment used was a TOPCON BM-3 Luminance Meter, SECV Certificate No 87/127.
  • the sign presents a uniform appearance when viewed from within the range of directions from which it is required to be seen.
  • CLIENT STANILITE PACIFIC. LTD.
  • ADDRESS P.O. BOX 182, AUBURN. NSW. 2144
  • CONTACT Mr. W. MacDouall.
  • MANUFACTURER STANILITE PACIFIC LTD.
  • TYPE Edge Lit EXIT SIGN, Single Sided, Series 2000/110/D.
  • test voltage was 88V DC being 80% of the 11OV DC central system in accordance with the requirements of Clause A2.4. Test Voltage of AS2293, Part 1.
  • the sign presents a uniform appearance when viewed from within the range of directions from which it is required to be seen.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

Un ensemble de panneau indicateur éclairé latéralement et illuminé intérieurement comprend une source lumineuse (15) linéaire, un matériau plan (12) capable de passer intérieurement de la lumière émise à partir de la source lumineuse (15) linéaire, le matériau plan étant d'une composition sensiblement uniforme de bout en bout et ayant des faces antérieure (18) et postérieure (19) planes. Les faces planes sont reliées par une surface de bordure (16, 20, 21, 17) dont au moins une partie est adaptée pour recevoir la lumière émise à partir de la source lumineuse (15) linéaire, au moins une partie de la lumière émise à partir de la source lumineuse (15) linéaire étant répartie dans le matériau plan (12). L'ensemble comprend un corps (20) de panneau indicateur, qui dans la plupart des modes de réalisation de l'invention comprend une rugosité de surface d'un type spécifique grâce à laquelle les rayons de lumière émanant de la source lumineuse (15) linéaire et frappant le corps (20) sont réfléchis soit vers l'avant jusqu'à la face plane antérieure (18), soit vers l'arrière jusqu'à la face plane postérieure (19). Dans un mode de réalisation particulier de l'invention, la face antérieure (12) forme un angle avec la face postérieure (19), ce qui donne au matériau plan (12) une structure en forme de coin. L'ensemble est particulièrement adapté pour un éclairage à but spécifique requis pour des panneaux indicateurs de sortie et analogues où des conditions strictes relatives au contraste entre l'éclairage des lettres et du fond d'un panneau indicateur doivent être remplies.
PCT/AU1989/000223 1988-05-19 1989-05-19 Luminaires pour panneaux indicateurs WO1989011713A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPI8338 1988-05-19
AUPI833888 1988-05-19

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WO1989011713A1 true WO1989011713A1 (fr) 1989-11-30

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997044771A1 (fr) * 1996-05-17 1997-11-27 Wilson, Ian, Brownlie Dispositif d'affichage
WO1998021520A1 (fr) * 1996-11-14 1998-05-22 Antonio Michael Derose Dispositif lumineux
AU702512B2 (en) * 1994-05-18 1999-02-25 Sorelec Display and indicating panel
AU716823B2 (en) * 1996-05-17 2000-03-09 Sotek Australia Pty Limited Display apparatus
EP1052450A1 (fr) * 1999-05-13 2000-11-15 G. BARGELLINI & C. S.p.A. Dispositif d'éclairage,en pariculier pour affichage d'indications et signalisation d'urgences
WO2001073732A1 (fr) * 2000-03-31 2001-10-04 Legrand Minitronics Pty Ltd Support d'indication pour eclairage de secours
WO2001073731A1 (fr) * 2000-03-31 2001-10-04 Legrand Minitronics Pty Ltd Cartouche de signalisation
EP1903358A1 (fr) * 2006-09-22 2008-03-26 Centro Ricerche Plast-Optica S.r.l. Dispositif d'éclairage avec guide de lumière et moyens pour réorienter de la lumière extrait de ce guide

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WO1984004838A1 (fr) * 1983-05-26 1984-12-06 Ulf Henke Montage pour dispositif d'affichage sur lequel peut agir de la lumiere et qui est dote d'une surface d'affichage
AU6108786A (en) * 1985-12-05 1987-06-11 Rangi, K.J. Display device
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US1933216A (en) * 1931-07-13 1933-10-31 Joseph Weidenhoff Inc Sign
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GB664556A (en) * 1949-04-26 1952-01-09 Albert Clement Brooks Improvements in or relating to illuminated signs and the like
AU2422554A (en) * 1954-01-07 1954-03-11 Richard Gann Surface lighting apparatus
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US4791745A (en) * 1987-03-20 1988-12-20 Pohn Mac R Black light display system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU702512B2 (en) * 1994-05-18 1999-02-25 Sorelec Display and indicating panel
WO1997044771A1 (fr) * 1996-05-17 1997-11-27 Wilson, Ian, Brownlie Dispositif d'affichage
AU716823B2 (en) * 1996-05-17 2000-03-09 Sotek Australia Pty Limited Display apparatus
US6215409B1 (en) 1996-05-17 2001-04-10 Solaglo Pty Ltd. Display apparatus
WO1998021520A1 (fr) * 1996-11-14 1998-05-22 Antonio Michael Derose Dispositif lumineux
EP1052450A1 (fr) * 1999-05-13 2000-11-15 G. BARGELLINI & C. S.p.A. Dispositif d'éclairage,en pariculier pour affichage d'indications et signalisation d'urgences
WO2001073732A1 (fr) * 2000-03-31 2001-10-04 Legrand Minitronics Pty Ltd Support d'indication pour eclairage de secours
WO2001073731A1 (fr) * 2000-03-31 2001-10-04 Legrand Minitronics Pty Ltd Cartouche de signalisation
EP1903358A1 (fr) * 2006-09-22 2008-03-26 Centro Ricerche Plast-Optica S.r.l. Dispositif d'éclairage avec guide de lumière et moyens pour réorienter de la lumière extrait de ce guide

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