Classifications

• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F13/00—Illuminated signs; Luminous advertising
  • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F13/00—Illuminated signs; Luminous advertising
  • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
  • G09F13/0409—Arrangements for homogeneous illumination of the display surface, e.g. using a layer having a non-uniform transparency
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F13/00—Illuminated signs; Luminous advertising
  • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
  • G09F13/0413—Frames or casing structures therefor
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F13/00—Illuminated signs; Luminous advertising
  • G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
  • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F19/00—Advertising or display means not otherwise provided for
  • G09F19/22—Advertising or display means on roads, walls or similar surfaces, e.g. illuminated
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F13/00—Illuminated signs; Luminous advertising
  • G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
  • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
  • G09F2013/222—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent with LEDs

Definitions

• the invention relates to a transparent illuminating device. More particularly, the invention relates to a transparent backlighting device with light emitting diodes.
• the invention can be used in particular in backlit billboards, signs, or the display boxes.
• Billboards and more particularly urban furniture for information have become a communication medium very popular with advertisers because they allow to display an advertising campaign in the heart of cities, in areas where advertising is generally restricted.
• Street furniture is generally in the form of a 1.20 m by 1.76 m panel, or about 2 m 2 and is mainly used for advertising and / or municipal information.
• the urban furniture for the information of the prior art is generally equipped with a box containing the advertising and / or informative poster, an interior lighting system and a diffusing material, for example extruded PMMA type white on which is fixed the poster.
• the lighting system used is often in the form of fluorescent or neon tubes that extend along the street furniture box for information purposes.
• the document FR2882609 describes a billboard whose posters are backlit by neon tubes.
• This lighting system has the disadvantage of leading to excessive electrical consumption, high thicknesses of street furniture for information which must take into account the diameter of the tubes.
• the light emitted by this lighting system is not homogeneous on the entire advertising or informative poster.
• the use of a diffusing material such as PMMA leads to high maintenance costs related to their regular replacement.
• an objective of the invention in at least one of its embodiments, is to provide an illuminating device, more particularly backlit, also called light box, transparent on at least one of its faces.
• Another object of the invention in at least one of its embodiments, is to implement such an illuminating device in a billboard and more particularly in a street furniture for information.
• Another object of the invention in at least one of its embodiments, is to provide a display panel and more particularly a street furniture for information that does not require the presence of a diffusing material of the PMMA type.
• the invention in at least one of its embodiments, still aims to reduce the energy consumption associated with the illumination of advertising and / or informational posters contained in a billboard and more particularly a street furniture for information.
• the invention in at least one of its embodiments, still aims to reduce the maintenance costs of such street furniture for information.
• the invention in at least one of its embodiments, still aims to reduce the thickness of such urban furniture for information.
• the invention relates to a transparent illuminating device, with light-emitting diodes comprising:
• first glazing unit with first and second main faces
• a second glazing with a main face facing the second face, said third face, and another opposite main face, said fourth face, a spacer which holds the first and second glazings (110, 120) at a certain distance; one of the other and defines an internal space between the second and third faces,
• the illuminating device comprises diodes arranged on at least a portion of the second and third faces of the glazings, said light-emitting diodes being spaced apart on the same line with a pitch of at least 50 mm, and each said first and second glazings (110, 120) being electrically conductive.
• the illuminating device according to the invention further comprises first and second glazing spaced from each other by a distance of from minimum 2 mm.
• the distance separating two glazings is determined in particular by the size of the light-emitting diodes and / or the thickness of plastic interleaves such as Poly-Vinyl-Butyral (PVB) or Ethyl-Vinyl-Acetate (EVA) films in the case of the use of laminated glass.
• the light-emitting diodes are spaced apart from one another by a pitch of between 50 and 200 mm. In a preferred manner, the pitch between light-emitting diodes (or inter-diode distance) is between 50 and 110 mm.
• the distance between the first and second glazings is between 2 and 150 mm.
• the diodes present on the second face are offset relative to the diodes present on the third face of the glazing, so that the light emission of the diodes present on the second face to through the second glazing is not hindered by the presence of the diodes present on the third face.
• the light-emitting diodes present on at least a portion of the second face are offset by a half-step in at least one direction relative to the light-emitting diodes (140) present on at least a portion of the third face (121) placed on the line opposite.
• the diodes present on the third face are then shifted by half a step in the two dimensions (that is to say along the X and Y axes) with respect to the light emitting diodes present on the line opposite. from the second side.
• the general principle of the invention is based on the implementation of light-emitting diodes on at least a portion of the inner faces of the illuminating device so as to illuminate on both sides of the device.
• the particular arrangement staggered and offset light emitting diodes on the internal faces of the device allows to backlight uniformly on both sides of the device.
• the distribution of the light-emitting diodes and the distance between the two glazings makes it possible to create larger lighting surfaces.
• the inventors have shown that the particular arrangement of the light-emitting diodes makes it possible to direct the luminous flux of the interior of the device to the outside without negative interference of the luminous flux coming from the light-emitting diodes placed on the opposite side.
• the particular arrangement of light-emitting diodes as well as the distance between the first and second glazings makes it possible to reduce the thickness of the device and to reduce the power consumption.
• the illuminating device according to the invention has several special features designed to allow homogeneous illumination without shadows and that on both sides of each glazing.
• the pitch between the light-emitting diodes is between 50 and 110 mm and the first and second glazing are spaced from each other by a distance of at least 24 mm .
• this particular inter-light-emitting diode distance makes it possible to improve the homogeneity of the light emitted by the light-emitting diodes and to avoid the point effect of the light-emitting diodes.
• the distance between the first and second glazings is between 24 and 150 mm.
• the thickness of the illuminating device is reduced thus allowing its use as a transparent illuminating device or backlit poster box for example.
• Such a configuration of the transparent illuminating device makes it possible to provide the light necessary for, in particular, projecting light in such a way uniform on eg posters, panels, photographs in a small space.
• the term "light-emitting diode or diode” means a quasi-point source, generally inorganic, typically based on semiconductor chip, source distinct from an OLED (organic diode) providing an extended illuminating surface.
• the illuminating device according to the invention is equipped with connectors or contact points for the interconnection of the respective circuits.
• the light-emitting diodes are directly connected to connection circuits on at least a portion of the second and third faces of the glazings.
• the illuminating device comprises first and second glazings, said glazings being either transparent conductive layer glasses having insulating strips obtained by ablation of conductive strips by scanning a laser beam, or by a means of metal son whose diameter is less than 500 ⁇ , or by printing (serigraphy) conductive tracks of width less than 500 ⁇ .
• the interior space is sealed by the first and second glazing and the spacer, which prevents the entry of dust between the glazing.
• the invention also relates to a method of manufacturing a transparent illuminating device as described above.
• the manufacture of a transparent illuminating device comprises the following steps: coating, at least partially, at least a portion of the second and third faces of the glazings using an electrically conductive coating, the coating conductor comprising at least one stack of a metal layer and optionally an insulating layer, the metal layer and the insulating layer being arranged between the second and third faces of the glazings,
• the electronic component comprising at least one connection terminal electrically connected to the conductive coating, securing the light-emitting diodes on at least a portion of the second face of the first glazing, interconnection of the light-emitting diodes on the third face of the second glazing, offset with respect to the light-emitting diodes placed on at least a part of the second face of the first glazing,
• metal layer is meant a single layer or a set of metal layers.
• the second and third faces of the glazings have light-emitting diodes on at least part of their surface.
• the diodes present on the third face are then offset by a half-step relative to the light emitting diodes present on the line opposite the second face.
• the diodes present on the third face are then shifted by half a step in the two dimensions (that is to say along the X and Y axes) with respect to the light emitting diodes present on the line opposite. from the second side.
• the invention also relates to a display panel comprising an illuminating device as described above and at least one poster support device (for example strips or fixing rails) adapted to fix at least one poster opposite at least one one of the first and fourth faces.
• the display panel may further comprise said poster disposed opposite said at least one of the first and fourth faces.
• an illuminating device as described above makes it possible to illuminate a sign positioned in front of the transparent illuminating device, also called a "light box".
• the use of an illuminating device as described above for illuminating posters can significantly reduce the thickness of the billboard, the power consumption and reduce the maintenance of billboards.
• the poster is positioned at a distance of at least 5 mm from the first and / or fourth faces of the glazings.
• the poster is positioned at a distance of between 10 and 30 mm from the first and / or fourth faces of the glazings. This minimum distance to be respected makes it possible to obtain a homogeneous light without areas of shadow on all the surface of the poster while reducing the thickness of the billboard.
• the display panel may comprise a box which has two main faces and delimits a hollow interior space, at least one of the main faces having at least one transparent part, the transparent illuminating device being contained in the box and the said support device.
• poster being adapted to position said at least one poster in the interior space of the box between said transparent portion of the box and the illuminating device.
• the display panel comprises a poster which is placed on the two opposite faces of the box between the illuminating device and the inner face of the box.
• two posters can be supported by the display panel and backlit by a single illuminating device.
• the transparent part is at least formed of a safety glass.
• Safety glass means a tempered glass or a laminated glass. This type of glass allows the protection of people against the risk of injury in case of breakage of glass.
• FIG. 1 shows a view of an illuminating device according to the invention
• FIG. 2 illustrates a display panel comprising an illuminating device according to the invention
• FIG. 3 shows a staggered arrangement of the light-emitting diodes
• Figure 4 shows a public billboard resting on a foot.
• a transparent illuminating device 100 comprising a first 110 and a second 120 glazings, comprising a plurality of light emitting diodes 140 or LEDs distributed over the second (112) and third (121) faces.
• the illuminating device comprises a first glazing unit 110, in particular a plane, preferably made of mineral glass or organic glass, with first 11 1 and second 112 faces, said face 112 being covered with a plurality of light-emitting diodes.
• a first glazing unit 110 in particular a plane, preferably made of mineral glass or organic glass, with first 11 1 and second 112 faces, said face 112 being covered with a plurality of light-emitting diodes.
• LEDs 140 arranged staggered and spaced from each other by a pitch of between 50 and 200 mm as shown in FIG. 3.
• the inter-LED distance more commonly known as Is between 50 and 110 mm and even more preferably between 70 and 100 mm;
• the illuminating device further comprises a second glazing 120, in particular a plane, preferably made of mineral glass or organic glass, with third 121 and fourth faces 122, said face 121 being covered with a plurality of light-emitting diodes, plus particularly LEDs 140 arranged staggered and spaced from each other by a pitch of between 50 and 200 mm, preferably between 50 and 110 mm, of even more preferably between 70 and 100 mm, the LEDs being opposite and offset from the LEDs placed on the face 112 of a half-step.
• a second glazing 120 in particular a plane, preferably made of mineral glass or organic glass, with third 121 and fourth faces 122, said face 121 being covered with a plurality of light-emitting diodes, plus particularly LEDs 140 arranged staggered and spaced from each other by a pitch of between 50 and 200 mm, preferably between 50 and 110 mm, of even more preferably between 70 and 100 mm, the LEDs being opposite and offset from the LEDs placed on the face 112
• the faces 112 and 121 comprise electronic circuits which make it possible to feed the LEDs 140, defined in a conductive layer previously deposited on the faces 1 12 and 121, by laser burning of a portion of the conductive layer.
• the conductive layer may also be deposited by photolithography or by printed etching processes. This contact element thus makes it possible to supply (in current and / or voltage) independently each of the glazings.
• separate monopole conductive elements can be used for each circuit to be powered.
• the electronic circuits can be obtained by coating, at least partially, at least a portion of the second 112 or third 121 faces with an electrically conductive coating, the conductive coating comprising at least one stack of a metal layer and optionally an insulating layer, the metal layer being disposed between the second 112 or third 121 faces and the insulating layer. Then at least one electronic component is arranged on the second 112 and / or third faces, the electronic component comprising at least one connection terminal electrically connected to the conductive coating.
• the presence or absence of an insulating layer is determined in particular by the deposition method of the metal layer, namely deposited by pyrolysis or by CVD (chemical vapor deposition). For example, if the metal layer is deposited pyrolytically (so-called hard layer), an insulating layer is not necessary whereas if the metal layer is deposited by CVD (so-called soft layer), then an insulating layer is required.
• the LEDs 140 are secured on at least a portion of the faces 112 and 121 by means of a conductive adhesive.
• the conductive zones supplying the LEDs are connected to power strips (bus bars).
• these bus bars are located on at least one edge of the glazing, so as to be concealed by a frame which covers the edges of the glazing and includes the power supply cables of the bus bars.
• the light-emitting diodes may be encapsulated, that is to say comprise a semiconductor chip and an envelope, for example an epoxy or PMMA type resin, encapsulating the chip.
• the functions of this envelope can be multiple: protection of the oxidation and moisture, ...
• the diodes 140 can be embedded in a common protective material to ensure a seal with water, dust .. .
• the diode 140 may be for example a semiconductor chip of the order of one hundred ⁇ or mm; and possibly with a minimal encapsulation for example of protection.
• the diodes may be simple chips with a low volume encapsulation including SMD type ("Surface Mounted Device" in English).
• the diode may be preferably: a "medium power" light emitting diode, that is to say greater than 0.1 W or of brightness greater than or equal to 8 lumens,
• a "high power" light emitting diode that is to say greater than or equal to 1W or brightness greater than or equal to 80 lumens.
• the light-emitting diode may preferably have a luminous efficiency of at least 40 lumens / watt (lm / W), or even at least 60 lm / W.
• FIG. 1 shows first and second glazings, the second 112 and third faces of which are covered at least on a portion of LEDs 140 of 60 W, for example of type NS2W150AT of FIG. NICHIA or NS2W150A-E from NICHIA.
• the LEDs are powered either by thin conductor strips 400 nm thick and slightly less than 55 mm wide, which cover the surface of the glazing or by means of metal wires whose diameter is less than 300 ⁇ . They provide a luminous flux extending over the visible spectrum and which passes through the transparent glazing for example to illuminate a poster.
• the first 110 and second 120 glazings being associated together via a spacer 130, sealed or not, and spaced apart by an internal space 131, said glazing being separated by a distance of between 35 and 150 mm, preferably from a distance of between 45 and 110 mm.
• Said spacer 130 may be a profile.
• the spacers used in the multiple glazings are generally a metallic hollow profile, extruded or formed, or organic material or a profile with brackets or an angled section, in this case the spacer is constituted by a continuous profile bent at the corners.
• the spacer is fixed inside the insulating glass by its side faces to the internal faces of the glass sheets by butyl rubber whose role is to seal the interior of the glazing with water vapor.
• the spacer is set back inside the glazing and close to the edges of said glazings 110 and 120, so as to provide a peripheral groove into which the sealing means of the mastic type, such as a polysulfide or polyurethane.
• the sealant confirms the mechanical assembly of the two glazings and ensures the sealing with liquid water and solvents. It is understood that any means capable of acting as a spacer can be used. It can be envisaged a spacer 130 which does not definitively seal the first and second windows together. Thus the first 110 and second 120 glazings can be easily separated so as to replace for example a defective light-emitting diode 140.
• the second 120 glazing incorporating light emitting diodes 140 such as that of Figure 1 (or Figure 3) (where a sectional view of the illuminating device is proposed).
• the LEDs are disposed on at least a portion of the third 121 face of the glazing, staggered and offset by half a step from the LEDs 140 placed on the line facing at least a portion of the second 112 face of the glazing.
• staggering is meant a repetitive arrangement of light-emitting diodes (or LEDs), line by line, the diodes being separated by a distance "a” called “pitch” and where every second line is offset by half a step "D" in relation to the line preceding or following it.
• Each line is distant from the line that precedes it and / or follows it by half a step d. Given that "d" is half the distance "a”.
• glass means all types of glasses and equivalent transparent materials such as mineral glasses and organic glasses.
• the mineral glass can be constituted indifferently of one or more types of known glasses such as soda-lime glasses, boron glasses, crystalline and semi-crystalline glasses.
• the organic glass may be a thermoset or rigid thermoplastic transparent polymer or copolymer such as, for example, a clear polycarbonate, polyester or polyvinyl synthetic resin.
• the glazings 110 and 120 are preferably of similar or identical dimensions, of the same nature, and of the same shape (rectangular, square ..) and optionally curved.
• the first 110 and the second 120 glazing may be clear or even extra-clear glass or a matte glass.
• the first 110 and second 120 glazings have a value TL (light transmission) of between 70 and 98% and a thickness of between 1 and 50 mm.
• the thickness may vary at different points on the surface of the glazing.
• the surface may be flat or curved.
• planar glazings of constant thickness are always preferred at any point on the surface.
• the first 110 and second 120 glazings are provided with at least one means for dispersing at least a portion of the light radiation.
• This dispersing means may be chosen from matting the glazing surface, sandblasting the glazing or even printing a relief.
• the matting may have been carried out using an aqueous solution of hydrofluoric acid, for example.
• FIG. 1 shows first 110 and second 120 planibel G type clear glass panes of AGC 1175 mm long and 1721 mm wide and 4 or 6 mm thick.
• the illuminating device according to the invention is notably produced according to the following steps: cutting with dimensions (for example 172 lmmx 1175mm) of a first glazing unit 110 (or first glass substrate) covered with a transparent electrically conductive layer, for example a Planibel G type glazing marketed by AGC Glass Europe; the glazing is then thermally tempered; embodiment of the electrical supply circuit of the LEDs 140 (or conductive pattern) by selective etching in the form of lines of the conductive layer (or patterning of the conductive layer) by means, for example, of a laser beam which locally burns the conductive layer so as to to create insulating lines, eg a hundred micron thick.
• LEDs 140 depositing and securing (for example by means of a conductive glue) LEDs 140, for example by means of an automatic machine of the "Pick &Place” type (as described in the patent application No. WO2009100769A1), according to the arrangement shown in FIG.
• the positive electrode (or positive contact pad) and the negative electrode (or negative contact pad ) of the LED 140 being respectively bonded to positive and negative electrodes (or positive and negative conductive domains) made on the supply circuit of the LEDs 140; applications of the connectors (for the anode, for example on the left and for the cathode on the right) in order to be able to connect the device to an external power supply); polymerization of the conductive adhesive in an oven; - Association of the first 110 and second 120 glazings through the spacer 130.
• the illuminating device according to the invention can form signaling lighting, decorative lighting, or architectural lighting.
• the illuminating device according to the invention may be intended in particular for a backlit display panel or more particularly an urban furniture for information.
• FIG. 2 shows a backlit display panel 200 comprising:
• a box 210 which delimits a hollow interior space 21 1 and has at least one transparent portion 212 on at least one of its main faces, a transparent illuminating device 100 according to the invention and, two posters 213 being each positioned in the interior space of the box between the inner wall 214 of the box 210 and the illuminating device 100, and facing the transparent part
• the poster 213 is positioned at a distance of at least 5 mm and preferably at least 10 mm from the first 111 and fourth 122 faces of the glazing of the illuminating device. In a preferred manner, the poster 213 is positioned at a distance of between 10 and 30 mm so as to reduce the shading effect due to the light emitted by the LEDs 140 on the poster 213.
• the poster 213 can be illuminated with a homogeneous light and this at lower cost.
• the use of LEDs 140 as a means to illuminate the poster can significantly reduce the maintenance frequency of billboards but also reduce energy consumption.
• the invention can also provide one or more of the following advantages: better distribution of the density of the radiation over the extent of the surface of the poster; - possibility of reducing the number of radiation emitting components;
• a lighting device 100 according to the invention for backlit posters positioned on either side of the device can significantly reduce the thickness of billboards.
• a display panel 200 according to the invention can for example measure 126mm thick against 190 or even 205 mm for billboards that conventionally use fluorescent or neon tubes that extend along the housing of the street furniture for information.
• the transparent illuminating device 100 is fixed to the casing 210 by means capable of ensuring the fixing of the illuminating device to the box of the display panel.
• the box 210 rests for example on a foot fixed to the ground on the public road or in another public place as shown in Figure 4.
• the box 210 defines a hollow interior space 211 and has at least one opening on at least one of its main faces, which opening is generally closed by means of a transparent window 212.
• the transparent window 212 used to obstruct the opening is preferably a safety glass of 8 to 10 mm, that is to say a glass tempered thermally or a laminated glass. This type of glass allows the protection of people against the risk of injury in case of breakage of glass.
• the poster is placed at a distance of between 5 and 30 mm from the opening of the box.
• a poster presentation device comprising for example a strip containing posters intended to be presented successively opposite the opening of the box behind the window.
• the strip may in particular be wound on two rollers, respectively upper and lower controlled by at least one electric motor. He heard, that the billboard might include a single sign attached behind the glass.
• the invention is not limited to the embodiments mentioned above.
• the skilled person can make any variant in the form of the display panel, the color of the light emitting diodes, their individual addressing to reduce consumption or create animations ...
• the invention is not not limited to a rectangular illuminating device.
• the invention also applies to the general field of lighting (thus to applications other than the backlighting of posters).

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Theoretical Computer Science (AREA)
• Business, Economics & Management (AREA)
• Accounting & Taxation (AREA)
• Marketing (AREA)
• Illuminated Signs And Luminous Advertising (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)
• Planar Illumination Modules (AREA)
• Fastening Of Light Sources Or Lamp Holders (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=51999444

Family Applications (1)

Country Status (5)

Citations (4)

Family Cites Families (3)

• 2014
  • 2014-12-01 WO PCT/EP2014/076088 patent/WO2015090917A1/fr active Application Filing
  • 2014-12-01 KR KR1020167018180A patent/KR102325567B1/ko active IP Right Grant
  • 2014-12-01 EA EA201690841A patent/EA032442B1/ru not_active IP Right Cessation
  • 2014-12-01 EP EP14805300.2A patent/EP3084749A1/fr not_active Withdrawn
• 2016
  • 2016-06-14 SA SA516371325A patent/SA516371325B1/ar unknown

Patent Citations (4)

Non-Patent Citations (1)

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