LED-embedded glass: Difference between revisions

Revision as of 01:37, 24 December 2010

Revision as of 03:47, 24 December 2010

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{{mergetoMerge to|Ledglass|date=December 2010}}

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'''Transparent LED embedded glass''' is a new [[composite material]] containing [[light emitting diode]]s (LED). It is used as building material and as glass type for many different products. This article is focusing on published<ref>D. Shavit: Transparent Electronic Interlayers, Proceedings of GPD Glass Performance Days, June 2009, pp. 177–180</ref>,<ref>D. Shavit: LED- and SMD embedded Polyester Interlayer Film for Lighting, Sensoric and functional Glass, Poster Session at GPD Glass Performance Days, June 2007, Page 28</ref>. specifications enabling [[building material]]s which will meet security and legislation aspects of [[laminated glass]].

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==Composite specification==

The LED Glass composite material may consist of using transparent metallized glass<ref>Hahn, T., EP0900971A1 [http://v3.espacenet.com/publicationDetails/biblio?DB=EPODOC&adjacent=true&locale=en_EP&FT=D&date=19990310&CC=EP&NR=0900971A1&KC=A1 "Lighting device containing LEDs on glass"]</ref> as electricity conductor. In this case the final composite specification will be:

* '''Top Layer:'''...Standard glass

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==Thermoplastics used==

The transparent thermoplastic material will usually show a quite similar light refractive index compared to glass. Typical thermoplastics used in the glass industry to produce these type of security glazings will consist of Thermoplastic Polyurethane<ref>Bayer Inc., US2006135728 [http://v3.espacenet.com/publicationDetails/biblio?CC=JP&NR=2006169536A&KC=A&FT=D&date=20060629&DB=EPODOC&locale=en_EP "Thermoplastic polyurethane (TPU) having good adhesion to glass "]</ref> (TPU), Ethyl-Vinyl-Acetate<ref>Bridgestone Inc., DE4308885(B4) [http://v3.espacenet.com/publicationDetails/biblio?CC=DE&NR=4308885A1&KC=A1&FT=D&date=19930923&DB=EPODOC&locale=en_EP "Laminated glass with thermoset film of (meth)acrylate or hydrocarbon resin – containing EVA and organic peroxide for high impact strength, penetration resistance and transparency "]</ref> (EVA) or Poly-Vinyl-Butyral<ref>Solutia Inc., WO03057478 [http://v3.espacenet.com/publicationDetails/biblio?DB=EPODOC&adjacent=true&locale=en_EP&FT=D&date=20080320&CC=IL&NR=162701A&KC=A "GLASS LAMINATION PROCESS AND APPARATUS"]</ref> (PVB).

==Production==

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# Lamination of the glasses according the specification mentioned above

Because most of the glass companies are not skilled to mount LEDs (Light Emitting Diodes) onto metallized glass, it makes sense to locate the LEDs on a separate transparent conductive polymeric interlayer<ref>D. Shavit: The developments of LEDs and SMD Electronics on transparent conductive Polyester film, Vacuum International, 1/2007, S. 35 ff</ref>,<ref>D. Shavit: Elektronische Komponenten in Glaslaminaten: Entwicklung, Stand und Ausblick, Glas, Architektur & Technik, 1/2007</ref>,<ref>SUN-TEC Swiss United Technologies Inc. Daniel Shavit, DE202007008410 [http://v3.espacenet.com/publicationDetails/biblio?DB=EPODOC&adjacent=true&locale=en_EP&FT=D&date=20090630&CC=CH&NR=698260B1&KC=B1 "Translucent conductive Interlayer with SMD Surface Mounted Electronic Devices – LED embedded films"]</ref> which may be laminated by any glass lamination unit. In other words, the remaining process for glass lamination units will consist of laminating together standard glass using 2 layers of thermoplastic interlayers to sandwich ready to use LED embedded films. The final specification will be:

* '''Top layer:'''.. Glass

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* '''Bottom layer:'''..Glass

Within this last specification mentioned above, the 2 thermoplastic layers together with the LED Interlayer will reach a total thickness of about 2mm. The usually very economical PVB is the most used [[Laminated_glassLaminated glass|lamination interlayer]]. Its lamination is based on a nip roller pre-heating step followed by an autoclaving process with a final stage at 135 °C and 14 athmospheres. However, polyester has a better adhesion to [[Thermoplastics_polyurethanes_Thermoplastics polyurethanes (TPU)|TPU]], to [[Ethylene-vinyl_acetatevinyl acetate|EVA]] or to [[http://http://www.bridgestone.com/products/diversified/evasafe/index.html|EVASAfe]], which are often laminated using simple vacuum tables. EVASafe contain some hygroscopic crosslinking agent, which will allow its partial crosslinking to active sites of the substrates.

==References==

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{{DEFAULTSORT:Transparent Led Embedded Glass}}

[[Category:Glass]]

[[Category:Electronics]]