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(11)

EP 2 550 647 A1

(12)

(43) Date of publication: 30.01.2013 Bulletin 2013/05 (21) Application number: 11711815.8 (22) Date of filing: 22.03.2011

(51) International Patent Classification (IPC):  G08G 5/00(2006.01) (86) International application number: PCT/EP2011/054352 (87) International publication number: WO 2011/117242 (29.09.2011 Gazette 2011/39)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 22.03.2010 GB 201004759 (71) Applicant: Imperial Innovations Limited London, Greater London SW7 2PG (GB)	(72) Inventor: SCHUSTER, Wolfgang Horst-Werner Alexander London W14 3BW (GB) (74) Representative: Roberts, Gwilym Vaughan et al Kilburn & Strode LLP 20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)