@patent{P104.002, author={De Smet, H. and Van den Steen, J. and Van Doorselaer, G. and Van Calster, A.}, title={WO 2004/001715 A1 Refresh pixel circuit for active matrix}, booktitle={World Intellectual Property Organization, International Bureau}, year={2004}, month={1}, number={1715 A1}, pages={1-39+1-16}, series={WO}, }