EP1954487A1 - Glass product - Google Patents

Glass product

Info

Publication number
EP1954487A1
EP1954487A1 EP06819611A EP06819611A EP1954487A1 EP 1954487 A1 EP1954487 A1 EP 1954487A1 EP 06819611 A EP06819611 A EP 06819611A EP 06819611 A EP06819611 A EP 06819611A EP 1954487 A1 EP1954487 A1 EP 1954487A1
Authority
EP
European Patent Office
Prior art keywords
finished
semi
glass panel
flat glass
panel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06819611A
Other languages
German (de)
French (fr)
Inventor
Hugues Lefevre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGC Glass Europe SA
Original Assignee
AGC Glass Europe SA
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 AGC Glass Europe SA filed Critical AGC Glass Europe SA
Priority to EP06819611A priority Critical patent/EP1954487A1/en
Publication of EP1954487A1 publication Critical patent/EP1954487A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
    • C03C27/06—Joining glass to glass by processes other than fusing
    • C03C27/10—Joining glass to glass by processes other than fusing with the aid of adhesive specially adapted for that purpose
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • 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
    • 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
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • 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
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • B32B17/10183—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer being not continuous, e.g. in edge regions
    • B32B17/10192—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer being not continuous, e.g. in edge regions patterned in the form of columns or grids
    • 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
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • B32B17/10201—Dielectric coatings
    • B32B17/10211—Doped dielectric layer, electrically conductive, e.g. SnO2:F
    • 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
    • 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
    • B32B17/1055—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 resin layer, i.e. interlayer
    • B32B17/10761—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 resin layer, i.e. interlayer containing vinyl acetal
    • 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
    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • B32B17/1099—After-treatment of the layered product, e.g. cooling
    • 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
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00—Severing cooled glass
    • C03B33/07—Cutting armoured, multi-layered, coated or laminated, glass products
    • C03B33/076—Laminated glass comprising interlayers
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00—Severing cooled glass
    • C03B33/07—Cutting armoured, multi-layered, coated or laminated, glass products
    • C03B33/076—Laminated glass comprising interlayers
    • C03B33/078—Polymeric interlayers

Definitions

  • This invention relates to a semi-finished glass product incorporating a plurality of light emitting diodes (LEDs).
  • LEDs light emitting diodes
  • the present invention provides a semi-finished panel as defined in Claim 1.
  • the panel may be a glazing panel and/or a lighting panel.
  • the semifinished panel may be made to a standard flat glass panel size, for example a rectangular PLF size of substantially 6m x 3m, a square DLF size substantially 3m x 3m or 2m by 2m or a substantially rectangular block size of about 3m by 2m or of a size greater than about 0.75m by 0.55m.
  • the cutting to size may involve trimming the semi-finished panel to size, for example by removing up to 10% or up to 20% of its surface area; this may be appropriate when the semi-finished panel is to be transformed into a glazing panel, for example for use as a window, skylight, glass partition or glass wall covering.
  • the cutting to size may involve manufacturing a plurality of finished pieces or panels from the semi-finished panel; this may be appropriate when the
  • 4350 - SEMIPAN semi-finished panel is to be transformed into a glazing panel or a lighting panel.
  • the semi-finished glass panel of the present invention opens the way to far wider use of flat glass panels incorporating LEDs.
  • the time delay between receiving an order and delivering a finished panel may be significantly reduced by cutting to size the semi-finished panels of the present invention as opposed to manufacturing a desired size of panel from its constituent parts once the order has been received.
  • the cost of the finished panel may be significantly reduced by benefiting from magnitudes of scale made possible by manufacture of the semi-finished panels of the present invention.
  • flat glass panel as used herein should be understood as referring to a glass panel having external surfaces in spaced substantially parallel planes, particularly as required to satisfy accepted standards for flat laminated glass panels for architectural use, and as opposed to glass panels that have been intentionally bent or curved to a desired form at their softening temperature.
  • Provision of the semi-finished glass panels in rectangular or square sheets may facilitate handling and transportation, particularly when the sheets are of a size commonly used in glass industry.
  • provision of the semi-finished panels in standard sizes may prevent wastage when cutting to final size.
  • 4350 - SEMIPAN Flat soda lime glass particularly float glass, may be used for one and preferably both of the glass sheets.
  • One or both of the glass sheets may be clear glass, extra clear glass or body tinted glass.
  • the semi-finished glass panel may be substantially transparent.
  • it may have a light transmission (CIE Illuminant C) of greater than or equal to 40%, 50%, 60% or 70% and/or a level of haze of less than or equally to 5%, 3% or 2%.
  • the semi-finished glass panel may be substantially transparent.
  • it may have a light transmission (CIE Illuminant C) of less than or equal to 20%, 10%, or 5% and/or a level of haze of greater than or equally to 30%, 40% or 50%.
  • the electrically conducting pathways may be provided by an electrically conducting coating layer provided directly on one of the surfaces of one of the glass sheets.
  • This may be a sputtered coating stack which may have a physical thickness in the range of 5 nm to 300 nm, for example a coating stack comprising ITO or silver.
  • it may be a pyrolytic coating, particularly one deposited by chemical vapour deposition, which may have a thickness in the range of 100 nm to 5000 nm, for example a coating comprising tin oxide doped with fluorine or antimony.
  • the sheet resistance of the conducting coating layer may be within the range of 1 to 6 ohms/square or within the range of 2 to 20 ohms/square.
  • Interruptions may be provided in the conductive coating layer so as to define one or more electrical pathways; such interruptions may be provided by masking during deposition of the coating layer or by ablation, for example laser ablation, chemical etching or abrasion. Provision of the electrically conducting pathways directly on one of the surfaces of one of the glass
  • 4350 - SEMIPAN sheets may facilitate cutting to size of the semi-finished panels as the electrically conducting pathway may be cut at the same time as the glass is cut to size without requiring an additional cutting operation.
  • the electrically conductive pathways may be provided by an electrically conductive coating layer provided on a substrate, for example a PET film, arranged between and laminated to each of the first and second glass sheets, for example via layers of PVB (polyvinylbutyral) .
  • the coating layer may be a sputtered coating layer as referred to above.
  • a substantially transparent electrically conductive coating layer may be preferable when some or all of the LEDs are arranged to provide illuminate that will pass through the electrically conducting pathway.
  • the first and second glass sheets may be laminated together to form a laminated assembly by a plastics interlayer which comprises one or more sheets of PVB or a resin, for example EVA.
  • the plastics interlayer may be substantially transparent; it may be neutral or clear in colour or it may be body tinted.
  • the majority and more preferably substantially the entire surface area of the semi-finished glass panel is provided with LEDs, that is to say that the LEDs form an array of spaced LEDs with the array covering greater than 50%, 60%, 70%, 80% or 90% of the surface area of the panel.
  • the semi-finished glazing panel may incorporate at least
  • the first and second glass sheets preferably have a thickness within the range of 2.5 mm to 10 mm.
  • the semi-finished glass panel and/the finished glass panels cut there from may have a mechanical resistance as defined in European Standard EN12600 (often referred to as the pendulum test) of 3B3, preferably 2B2 and more preferably IBl.
  • Fig 1 is a plan view of a semi-finished glass panel
  • Fig 2 is an expanded cross section
  • Fig 3 an expanded plan view
  • Fig 4 is a plan view of a series of finished glass panels cut from the semi-finished glass panel of Fig 1.
  • Semi-finished glass panel 10 comprises first 11 and second 12 flat, clear, 3mm thick soda lime float glass sheets laminated together by means of a 0.76 mm thick sheet of PVB 13.
  • the inner surface 14 of the first glass sheet 11 is provided with a substantially colour neutral CVD coating stack 15 comprising an SiOxCy undercoat and an overlying SnO2:F coating.
  • Interruptions 16 in the coating stack 15 formed by laser ablations about 70 microns wide define electrically conducting pathways between LEDs 17 which are soldered or attached with an electrically conductive adhesive 19 either side of the laser ablations 16.
  • Each LED is in direct contact with the coating 15 of the first glass sheet 11 , the spacing shown in FIG 2 being schematic and not representative of the actual positioning. Additional laser ablations 18 divide the array of LEDs 17 in to individual lines of LEDs which are connected in series.
  • the LEDs are adapted to provide illumination through the second glass sheet 12, i.e. without passage
  • the semi-finished glass panel has dimensions of about 3m x 1.6 m and comprises about 1920 LEDs arranged in a regular grid at 5cm intervals such that the array of diodes covers substantially the entire area of the semi-finished glass panel.
  • Each LED has a surface area of about 4mm 2 .
  • the semi-finished panel 10 is cut to a desired size as illustrated schematically in Fig 4 where three final cut size glass panels 31, 32, 33 are formed by scoring and snapping the panel 10. Off cuts 34,35 are not useable in this example.
  • Each of the final size glass panels 31, 32 and 33 is subsequently finished by proving electrical connections to enable electrical power to be supplied to illuminate the incorporated LEDs.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Led Device Packages (AREA)

Abstract

A semi-finished glass panel incorporating a plurality of LEDs is adapted to by cut to finished size.

Description

Glass product
This invention relates to a semi-finished glass product incorporating a plurality of light emitting diodes (LEDs).
According to a first aspect, the present invention provides a semi-finished panel as defined in Claim 1.
The dependent claims define features of preferred or alternative embodiments of the invention.
Other aspects of the invention are defined in other independent claims.
The panel may be a glazing panel and/or a lighting panel.
One of the advantages of the present invention resides in providing a semi-finished panel, that is to say, a panel that is not adapted to be used in its semi-finished dimensions but is adapted to be cut to its desired size in a subsequent cutting operation. The semifinished panel may be made to a standard flat glass panel size, for example a rectangular PLF size of substantially 6m x 3m, a square DLF size substantially 3m x 3m or 2m by 2m or a substantially rectangular block size of about 3m by 2m or of a size greater than about 0.75m by 0.55m.
The cutting to size may involve trimming the semi-finished panel to size, for example by removing up to 10% or up to 20% of its surface area; this may be appropriate when the semi-finished panel is to be transformed into a glazing panel, for example for use as a window, skylight, glass partition or glass wall covering. Alternatively, the cutting to size may involve manufacturing a plurality of finished pieces or panels from the semi-finished panel; this may be appropriate when the
4350 - SEMIPAN semi-finished panel is to be transformed into a glazing panel or a lighting panel.
Up until now, glass panels incorporating LEDs have been primarily hand assembled, craftsmen made items for which the LEDs are assembled on the finished size products. It has also been suggested to incorporate a flexible film carrying a plurality of LEDs into a curved automotive windscreen. In opposition to these prior proposals, the semi-finished glass panel of the present invention opens the way to far wider use of flat glass panels incorporating LEDs. The time delay between receiving an order and delivering a finished panel may be significantly reduced by cutting to size the semi-finished panels of the present invention as opposed to manufacturing a desired size of panel from its constituent parts once the order has been received. Furthermore, the cost of the finished panel may be significantly reduced by benefiting from magnitudes of scale made possible by manufacture of the semi-finished panels of the present invention.
The term "flat glass panel" as used herein should be understood as referring to a glass panel having external surfaces in spaced substantially parallel planes, particularly as required to satisfy accepted standards for flat laminated glass panels for architectural use, and as opposed to glass panels that have been intentionally bent or curved to a desired form at their softening temperature.
Provision of the semi-finished glass panels in rectangular or square sheets may facilitate handling and transportation, particularly when the sheets are of a size commonly used in glass industry.
Furthermore, provision of the semi-finished panels in standard sizes may prevent wastage when cutting to final size.
4350 - SEMIPAN Flat soda lime glass, particularly float glass, may be used for one and preferably both of the glass sheets. One or both of the glass sheets may be clear glass, extra clear glass or body tinted glass.
Particularly when intended for use in window applications, the semi-finished glass panel may be substantially transparent. In this case, it may have a light transmission (CIE Illuminant C) of greater than or equal to 40%, 50%, 60% or 70% and/or a level of haze of less than or equally to 5%, 3% or 2%.
Particularly when intended for decoration and/or lighting purposes, it may be unnecessary and/or undesired for the semi-finished glass panel to be substantially transparent. In this case, it may have a light transmission (CIE Illuminant C) of less than or equal to 20%, 10%, or 5% and/or a level of haze of greater than or equally to 30%, 40% or 50%.
The electrically conducting pathways may be provided by an electrically conducting coating layer provided directly on one of the surfaces of one of the glass sheets. This may be a sputtered coating stack which may have a physical thickness in the range of 5 nm to 300 nm, for example a coating stack comprising ITO or silver. Alternatively, it may be a pyrolytic coating, particularly one deposited by chemical vapour deposition, which may have a thickness in the range of 100 nm to 5000 nm, for example a coating comprising tin oxide doped with fluorine or antimony. The sheet resistance of the conducting coating layer may be within the range of 1 to 6 ohms/square or within the range of 2 to 20 ohms/square. Interruptions may be provided in the conductive coating layer so as to define one or more electrical pathways; such interruptions may be provided by masking during deposition of the coating layer or by ablation, for example laser ablation, chemical etching or abrasion. Provision of the electrically conducting pathways directly on one of the surfaces of one of the glass
4350 - SEMIPAN sheets, particularly in the form of a coating layer, may facilitate cutting to size of the semi-finished panels as the electrically conducting pathway may be cut at the same time as the glass is cut to size without requiring an additional cutting operation.
Alternatively, the electrically conductive pathways may be provided by an electrically conductive coating layer provided on a substrate, for example a PET film, arranged between and laminated to each of the first and second glass sheets, for example via layers of PVB (polyvinylbutyral) . In this case, the coating layer may be a sputtered coating layer as referred to above.
Use of a substantially transparent electrically conductive coating layer may be preferable when some or all of the LEDs are arranged to provide illuminate that will pass through the electrically conducting pathway.
The first and second glass sheets may be laminated together to form a laminated assembly by a plastics interlayer which comprises one or more sheets of PVB or a resin, for example EVA. The plastics interlayer may be substantially transparent; it may be neutral or clear in colour or it may be body tinted.
Preferably, the majority and more preferably substantially the entire surface area of the semi-finished glass panel is provided with LEDs, that is to say that the LEDs form an array of spaced LEDs with the array covering greater than 50%, 60%, 70%, 80% or 90% of the surface area of the panel.
The semi-finished glazing panel may incorporate at least
50, 100 or 200 LEDs.
The first and second glass sheets preferably have a thickness within the range of 2.5 mm to 10 mm.
4350 - SEMIPAN The semi-finished glass panel and/the finished glass panels cut there from may have a mechanical resistance as defined in European Standard EN12600 (often referred to as the pendulum test) of 3B3, preferably 2B2 and more preferably IBl.
Non-limiting embodiments of the invention are described with reference to the accompanying drawings of which
Fig 1 is a plan view of a semi-finished glass panel ;
Fig 2 is an expanded cross section;
Fig 3 an expanded plan view ; and
Fig 4 is a plan view of a series of finished glass panels cut from the semi-finished glass panel of Fig 1.
Semi-finished glass panel 10 comprises first 11 and second 12 flat, clear, 3mm thick soda lime float glass sheets laminated together by means of a 0.76 mm thick sheet of PVB 13. The inner surface 14 of the first glass sheet 11 is provided with a substantially colour neutral CVD coating stack 15 comprising an SiOxCy undercoat and an overlying SnO2:F coating. Interruptions 16 in the coating stack 15 formed by laser ablations about 70 microns wide define electrically conducting pathways between LEDs 17 which are soldered or attached with an electrically conductive adhesive 19 either side of the laser ablations 16. Each LED is in direct contact with the coating 15 of the first glass sheet 11 , the spacing shown in FIG 2 being schematic and not representative of the actual positioning. Additional laser ablations 18 divide the array of LEDs 17 in to individual lines of LEDs which are connected in series.
In this embodiment, the LEDs are adapted to provide illumination through the second glass sheet 12, i.e. without passage
4350 - SEMIPAN through or hindrance by the conductive pathways provided by the coating layer 15.
The semi-finished glass panel has dimensions of about 3m x 1.6 m and comprises about 1920 LEDs arranged in a regular grid at 5cm intervals such that the array of diodes covers substantially the entire area of the semi-finished glass panel. Each LED has a surface area of about 4mm2.
The semi-finished panel 10 is cut to a desired size as illustrated schematically in Fig 4 where three final cut size glass panels 31, 32, 33 are formed by scoring and snapping the panel 10. Off cuts 34,35 are not useable in this example. Each of the final size glass panels 31, 32 and 33 is subsequently finished by proving electrical connections to enable electrical power to be supplied to illuminate the incorporated LEDs.
4350 - SEMIPAN

Claims

1. A semi-finished, flat glass panel adapted to be cut to size for subsequent use, comprising a first flat glass sheet , a plastics interlayer, a second flat glass sheet spaced from the first glass sheet by and laminated to the first glass sheet by the plastics interlayer ; and a plurality of LEDs sandwiched between the two glass sheets, the
LEDs being connected to an electrically conducting pathway adapted to provide electrical connection between the LEDs.
2. A semi-finished, flat glass panel in accordance with claim 1, in which the glass panel is substantially quadrilateral in shape with substantially right angled corners.
3. A semi-finished, flat glass panel in accordance with claim 2, in which the dimensions of the glass panel are greater than or equal to the dimensions selected from the list consisting of a) 1.8m by 1.2m b) 2.5m x 1,5m c) 2.8m x 2.8m d) 5.8m x 2.8 m.
4. A semi-finished, flat glass panel in accordance with any preceding claim, in which the first and second flat glass sheets are of flat soda lime glass.
5. A semi-finished, flat glazing panel in accordance with any preceding claim, in which the glazing panel is substantially transparent.
6. A semi-finished, flat glass panel in accordance with any preceding claim, in which the plastics interlayer comprises a layer of pvb.
4350 - SEMIPAN
7. A semi-finished, flat glass panel in accordance with any preceding claim, in which the conducting pathway is provided by an electrically conductive coating having a surface area substantially the same as the surface area of the glazing panel and provided with interruptions in the continuity of the electrically conductive coating which define one or more electrical pathways.
8. A semi-finished, flat glass panel in accordance with claim 7, in which the electrically conductive coating is substantially transparent.
9. A semi-finished, flat glass panel in accordance with any claim 7 or claim 8, in which the electrically conductive coating is provided on the surface of one of the flat glass sheets.
10. A method of commercialising a finished glass panel incorporating LEDs comprising the steps of: taking a semi-finished, flat glass panel according to any preceding claim; cutting the semi-finished, flat glass panel to a desired size.
11. A method of facilitating commercialisation of a finished glass panel incorporating LEDs comprising selling a semi-finished, flat glass panel according to any preceding claim to a processor capable of cutting the semi-finished, flat glass panel to a desired size.
4350 - SEMIPAN
EP06819611A 2005-11-21 2006-11-20 Glass product Withdrawn EP1954487A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06819611A EP1954487A1 (en) 2005-11-21 2006-11-20 Glass product

Applications Claiming Priority (3)

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EP05111041 2005-11-21
PCT/EP2006/068660 WO2007057459A1 (en) 2005-11-21 2006-11-20 Glass product
EP06819611A EP1954487A1 (en) 2005-11-21 2006-11-20 Glass product

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EP1954487A1 true EP1954487A1 (en) 2008-08-13

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EP (1) EP1954487A1 (en)
JP (1) JP2009516926A (en)
KR (1) KR20080083122A (en)
CN (1) CN101443190A (en)
EA (1) EA013308B1 (en)
WO (1) WO2007057459A1 (en)

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CN101443190A (en) 2009-05-27
EA200801386A1 (en) 2008-12-30
WO2007057459A1 (en) 2007-05-24
KR20080083122A (en) 2008-09-16
JP2009516926A (en) 2009-04-23
EA013308B1 (en) 2010-04-30

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