Tuesday, March 17, 2009

US Patent 7504050 - Nanoparticle enhanced electrophoretic display


Electrophoretic displays are one of the principle technology used to create electronic paper having the appearance and flexibility similar to paper. This patent from Sipix Imaging teaches a nanoparticle filler providing improved transparency and reduced wear of the displays. Claim 9 reads:

9. An electrophoretic display which comprises

a) microcups formed from a composition comprising a microcup forming material and a conductive filler in the form of nanoparticles and having a volume resistivity of less than about 10000 ohm cm; and

b) an electrophoretic fluid filled in the microcups wherein said electrophoretic fluid comprises charged pigment particles dispersed in a solvent.