Technical University of Crete, Department of Electronic and Computer Engineering, University Campus, Chania, Crete, Greece. michalis@display.tuc.gr|Technical University of Crete, Department of Electronic and Computer Engineering, University Campus, Chania, Crete, Greece. michalis@display.tuc.gr|Technical University of Crete, Department of Electronic and Computer Engineering, University Campus, Chania, Crete, Greece. michalis@display.tuc.gr|Technical University of Crete, Department of Electronic and Computer Engineering, University Campus, Chania, Crete, Greece. michalis@display.tuc.gr|Technical University of Crete, Department of Electronic and Computer Engineering, University Campus, Chania, Crete, Greece. michalis@display.tuc.gr|Technical University of Crete, Department of Electronic and Computer Engineering, University Campus, Chania, Crete, Greece. michalis@display.tuc.gr