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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
  • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
  • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
  • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
  • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
  • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
  • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
  • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
  • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
  • B32B17/10165—Functional features of the laminated safety glass or glazing
  • B32B17/10541—Functional features of the laminated safety glass or glazing comprising a light source or a light guide
• • 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
  • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
  • B60Q3/20—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for lighting specific fittings of passenger or driving compartments; mounted on specific fittings of passenger or driving compartments
  • B60Q3/208—Sun roofs; Windows
• • 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
  • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
  • B60Q3/50—Mounting arrangements
  • B60Q3/51—Mounting arrangements for mounting lighting devices onto vehicle interior, e.g. onto ceiling or floor
• • 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
  • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
  • B60Q3/60—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects
  • B60Q3/62—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides
  • B60Q3/64—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides for a single lighting device
• • 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
  • G02B6/0073—Light emitting diode [LED]
• • 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
  • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
  • G02B6/0095—Light guides as housings, housing portions, shelves, doors, tiles, windows, or the like

Definitions

• the present invention relates to an illuminating glazing, in particular a glazing for vehicles, capable of emitting light in an oriented manner.
• LED modules light-emitting diode
• illuminating windows often have a function of ambient lighting.
• the means for extracting the light diffuse indeed the light, extracted from the illuminated sheet, indifferently in all directions. In some cases it may however be desirable, if not necessary, to limit the angle of diffusion of the extracted light.
• the present invention is based on the idea of integrating the deflector function in the heart of the glazing by configuring, in a limited area of the glazing, one of the main faces of the illuminated sheet as a relief comprising geometric patterns provided with a reflective interface and able to direct the light.
• the reflection of the light must be very predominantly specular type.
• reflective interface refers here the interface between the illuminated sheet and a solid medium in contact therewith
• the interface between a plane structure contiguous to the illuminated sheet and a solid medium in contact with this plane structure so that the light can pass freely from the illuminated sheet in this contiguous flat structure, it must have a refractive index greater than or equal to the refractive index of the illuminated sheet.
• the present invention more particularly relates to an illuminating glazing comprising
• n i a first glass sheet of refractive index n i with a first main face, a second main face and a wafer;
• a transparent polymer film in adhesive contact with the second major face of the first sheet, said film having an index of refraction n 2 ⁇ n;
• a light source preferably a light emitting diode module (LED module) positioned facing the edge of the first sheet of glass,
• LED module light emitting diode module
• said glazing being characterized in that an area of the second major face of the first glass sheet is provided with a reflective relief or is covered with a flat, transparent and transparent structure of refractive index n 3 greater than or equal to ni, provided with a reflective relief.
• the invention also relates to a vehicle, preferably a motor vehicle having such an illuminating glazing, the illuminating glazing preferably part of the roof of the vehicle.
• this relief zone which acts as a deflector is preferably significantly less than that of the first sheet. It advantageously represents less than 30%, preferably between 1 and 25%, in particular between 1 and 10% of the extent of the first sheet.
• the glazing of the present invention may be a single glazing unit, preferably made of toughened glass, or a laminated glazing unit comprising at least two single sheets glued to each other in known manner by means of a lamination interlayer.
• the glazing unit of the present invention therefore further comprises a second glass sheet with a first major face, a second major face, and a wafer, the transparent polymer film then acting as interlayer lamination and being in adhesive contact with the second major face of the first glass sheet and with the first major face of the second glass sheet.
• the transparent polymer film When the transparent polymer film is a lamination interlayer it may consist of the materials usually used for this purpose, provided that they have an optical index n 2 less than the optical index of the first glass sheet (ni).
• n 2 the optical index of the first glass sheet
• a material which is perfectly suitable for polyvinyl butyral which has an optical index of approximately 1.48, ie an optical index less than the optical index.
• mineral glass classically close to 1.5.
• first sheet will always designate the glass sheet illuminated at its edge by the light source or sources.
• the first sheet or illuminated sheet is preferably that in contact with the interior of the vehicle or building.
• first main face shall be referred to as the face intended to be oriented towards the inside of the passenger compartment of the vehicle or towards the interior of the building and "second principal face” that which will be directed towards the outside of the building or the cabin of the vehicle.
• second principal face that which will be directed towards the outside of the building or the cabin of the vehicle.
• the reflective relief must have a low roughness so that the reflection is essentially specular type.
• the relief and roughness of the reflective interface are chosen so that the total widths at mid-height of the angular distribution of the light intensity emitted by the system are preferably between 30 ° and 60 °.
• a greater roughness of the reflective relief will result in a more diffuse reflection and therefore a wider angular distribution, conversely a lower roughness of the reflective relief will result in a light reflection to more specular character and thus a more narrow angular distribution around the specular direction.
• the angular distribution of the luminous intensity emitted by the device is measurable by the goniophotometric methods well known to those skilled in the art and described for example in the reference documents of the International Commission on Illumination CIE 070-1987 The Measurement of Absolute Luminous Intensity Distributions "and” CIE 121 - 1996 The Photometry and Goniophotometry of Luminaires ".
• the width of the angular distribution of the light intensity is included in the desired values, it is possible, alternatively or in addition to a roughness of the reflective relief, to have a diffusing element in the first sheet, on the second or on the first major face of the first sheet in the immediate vicinity of the textured area having the reflective relief.
• This eventual diffusing element also has the aesthetic advantage of masking the texture of the reflecting interface for an observer looking, through the first major face of the first sheet, the area provided with this reflecting interface.
• the height of the reflecting relief is between 5 ⁇ and 1 mm, preferably between 10 ⁇ and 500 ⁇ , in particular between 20 and 100 ⁇ .
• the reflective relief may be the relief of an area of the second major face of the first sheet of glass.
• Such a relief could be created for example by laser engraving.
• Such a transparent flat structure may be a plastic film (organic polymer), preferably poly (ethylene terephthalate), polycarbonate, poly (methyl methacrylate), polystyrene.
• textured polymer films by a relief are commercially available and include for example Vikuiti ® Image Film Directing II marketed by 3M.
• a transparent flat structure comprising a suitable relief by depositing on the surface of the second main surface of the first sheet in a sol-gel manner a silica-based inorganic or organo-mineral coating.
• a relief may be formed on the surface of such a coating by applying a surface with negative relief during the solidification phase of the soil, for example as described in WO2008 / 14322.
• the relief to be able to play the role of deflector of the light, must be a reflective interface.
• Reflective interface in the present invention means an interface that reflects at least 50% of the visible light. This relief interface preferably reflects at least 80%, in particular at least 90% of the visible light.
• the reflectivity of the interface may be obtained for example by depositing a reflective coating, preferably a metal layer, in particular a layer of silver, copper, aluminum, gold, nickel or chromium, on the relief of the transparent flat structure or the surface of the second sheet.
• a reflective coating preferably a metal layer, in particular a layer of silver, copper, aluminum, gold, nickel or chromium
• the reflectivity of the relief may also be due to the fact that the refractive index n 2 of the transparent polymer film, which is in contact with the relief, is smaller than the index of either the first glass sheet or the index n 3 of the plane structure.
• the index n 2 is preferably at least 0.02, preferably at least 0.1, less than the index or the first glass sheet or the index n 3 of the transparent flat structure.
• a third solution is to make the reflective relief by depositing a low index coating. having a refractive index n 4 of at least 0.02, preferably at least 0.1, at the index of either the first glass sheet or the index 3 of the transparent planar structure.
• the reflective relief advantageously comprises a plurality of geometric patterns consisting of flat or curved surfaces. It is preferably a regular relief with repetitive geometric patterns, that is to say geometric patterns having substantially the same shape and placed substantially equidistant from each other.
• Fresnel lens type relief or a Fresnel prism type relief.
• Fresnel-like relief is particularly preferred.
• a Fresnel prism is a succession of small prisms of constant angle. These prisms are arranged contiguously parallel to each other.
• Figure 3A shows a perspective view of a conventional Fresnel prism consisting of seven straight individual prisms.
• Figure 3 B shows an interesting variant of a Fresnel prism where the individual prisms of the relief have an arched shape.
• the individual prisms of said relief are preferably substantially parallel to the illuminated slice of the first glass sheet.
• essentially parallel is meant here that the prisms, when straight, form an acute angle less than 10 ° with the wafer or, for curved prisms, as shown in FIG. 3B, the tangents to the curve all together with the edge of the first leaf an acute angle of less than 10 °.
• the shape of the area provided with a relief or carrying a flat structure with a relief is independent of the shape of the prisms.
• the Fresnel prism thus comprises an alternation of oblique surfaces and surfaces substantially perpendicular to the base of the prism and to the general plane of the glazing. So that the Fresnel prism can effectively play its role of deflector, oblique reflective surfaces of Fresnel prism must be oriented towards the light source as will be explained in detail hereinafter with reference to the figures.
• the deflector relief When the deflector relief is located not directly in the second main surface of the first glass sheet, but on a transparent flat structure applied to this second main surface, it should be ensured that the light emitted by the light source and guided by the first sheet can freely enter said transparent planar structure.
• this transparent planar structure must be in contact with the second main surface of the first sheet, on all its surface opposite to that provided with the reflective relief.
• the transparent planar structure can be glued by means of a transparent adhesive having a refractive index close to n i. It is also possible to use a thermoplastic polymer for the transparent planar structure and to heat the polymer before contacting the first sheet, at least locally up to its point of softening. Yet another possibility is to form the transparent planar structure by RIM (injection-molding reaction) of a monomer mixture resulting in the formation of a thermoset polymer in situ.
• RIM injection-molding reaction
• the present invention thus makes it possible to extract light from the waveguide constituted by the first sheet in the absence of any diffusing element conventionally used in this technical field.
• the absence of such a diffusing element results in an improvement in the luminous efficiency of the glazing.
• the glazing of the present invention is therefore advantageously devoid of a light diffusing element.
• a diffusing element in the first sheet or on the first or second main face of the first sheet in the immediate vicinity of the textured area comprising the reflective relief.
• this element must have a haze sufficiently weak for the widths total at mid-height of the angular distribution of the luminous intensity emitted by the system are between 30 ° and 60 °.
• FIG. 1 is a cross section of the edge of a first embodiment of a glazing unit according to the invention
• FIG. 2 is a cross section of the edge of a second embodiment of a glazing unit according to the invention.
• FIG. 3A shows the shape of a right Fresnel prism type relief
• Figure 3 B shows the shape of an arched Fresnel Prism type relief.
• the glazing according to the invention shown in Figure 1 is a single glazing comprising a first glass sheet (1) with a first main face (11), a second main face (12) and a wafer (13).
• the first sheet has an optical index ni, generally close to 1.5.
• a light emitting diode module (8) is positioned in such a way that the emitting face of the LEDs faces the edge (13) of the first sheet.
• a zone (5) of the second main face (12) of the first sheet is textured, that is to say includes a relief Fresnel prism type, consisting of a plurality of individual prisms, each consisting of an oblique surface (4a) and a surface (4b) substantially perpendicular to the general plane of the first sheet.
• the hollows of the relief are filled by a material (7) with a low optical index (n 4 ⁇ nl), for example a silica-based inorganic material formed in situ by a sol-gel process.
• the entire second main face (12) of the first sheet is in adhesive contact with a transparent polymeric film (3) of optical index n 2 ⁇ ni which also covers the mineral material (7).
• the optical index n 2 of the spacer (3) Since the optical index n 2 of the spacer (3) is smaller than the optical index n of the first sheet, it functions as a waveguide for a light beam (R) emitted by the LED. .
• this radius (R) reaches the level of the relief of the textured zone (5), it is not refracted by the Fresnel prism-like interface but is reflected by one of the oblique surfaces (4a).
• the reflective oblique surfaces (4a) are all oriented towards the light source, this reflection of the light beam (R) is in a privileged manner towards a rather limited space under the glazing.
• FIG. 2 shows a cross section of the edge of a laminated glazing according to the invention.
• This glazing comprises a first sheet (1) with a first main face (11), a second main face (12) and a slice (13) and a second sheet (2) with a first main face (21) and a second face principal (22).
• the transparent film (3) in adhesive contact with the first main face (21) of the second sheet and the second main face (12) of the first sheet here acts as interlayer lamination.
• Side-emitting LED modules (8) are placed on the first main face of the second sheet (21) so that the emitting face of the LEDs faces the edge (13) of the first sheet.
• the textured zone (5) here corresponds, not to a reflective relief in the second main surface (12) of the first sheet, but to a flat and flat structure (6) provided with a reflective relief.
• the optical index n 3 of this flat structure (6) is greater than or equal to n 3 and a light ray R which arrives at the interface between the first sheet (1) and the plane structure (6) is not reflected by this interface but enters the flat structure. It is reflected only by one of the oblique surfaces (4a) of the reflecting interface that constitutes the relief in the zone (5).
• Figures 3A and 3B are provided primarily to illustrate two particularly preferred embodiments of the geometry of the reflective relief of the area (5).
• the two figures represent Fresnel prisms, consisting of a plurality of individual prisms each having a surface (4b) substantially perpendicular to the plane of the base of the prism, and an oblique surface (4a). It is these oblique surfaces (4a) which will preferably be oriented towards the light source and reflect the light towards a direction roughly perpendicular to the plane of the glazing.

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• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Planar Illumination Modules (AREA)
• Laminated Bodies (AREA)
• Led Device Packages (AREA)
• Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
• Optical Elements Other Than Lenses (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)
• Joining Of Glass To Other Materials (AREA)

Priority Applications (11)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Cited By (16)

Families Citing this family (14)

Citations (9)

Family Cites Families (18)

• 2012
  • 2012-05-10 FR FR1254297A patent/FR2990379B1/fr active Active
• 2013
  • 2013-05-03 MX MX2014013177A patent/MX354435B/es active IP Right Grant
  • 2013-05-03 KR KR1020147031116A patent/KR102120726B1/ko active Active
  • 2013-05-03 BR BR112014027226-3A patent/BR112014027226B1/pt not_active IP Right Cessation
  • 2013-05-03 JP JP2015510858A patent/JP6267189B2/ja active Active
  • 2013-05-03 PT PT137272498T patent/PT2846996T/pt unknown
  • 2013-05-03 EA EA201492058A patent/EA030715B1/ru not_active IP Right Cessation
  • 2013-05-03 EP EP13727249.8A patent/EP2846996B1/fr active Active
  • 2013-05-03 CA CA2870104A patent/CA2870104A1/fr not_active Abandoned
  • 2013-05-03 CN CN201380024068.7A patent/CN104271347B/zh active Active
  • 2013-05-03 ES ES13727249T patent/ES2820516T3/es active Active
  • 2013-05-03 US US14/399,826 patent/US9746600B2/en active Active
  • 2013-05-03 PL PL13727249T patent/PL2846996T3/pl unknown
  • 2013-05-03 WO PCT/FR2013/050990 patent/WO2013167832A1/fr not_active Ceased
  • 2013-05-08 AR ARP130101582A patent/AR090980A1/es unknown

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