Core-shell particles for electrophoretic display
OwnerWan Peter Hsu, Paul Chen +3inventors
InventorsWan Peter Hsu, Paul Chen, Denis Leroux, Zarng-Arh George Wu, Rong-Chang Liang
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Abstract
The invention relates to electrophoretic displays comprising core-shell pigment particles having a core of low specific gravity and low refractive index and a shell of high refractive index.
Claims37
A core-shell pigment particle suitable for use in an electrophoretic dispersion which comprises a low refractive index core and a high refractive index shell layer.
The pigment particle of claim 5 wherein said core is formed from a material having a refractive index in the range of 1.0-1.5.
A process for manufacture of a pigment particles comprising a core-shell pigment particle wherein said core has a low specific gravity and a low refractive index whereas said shell layer has a high refractive index, which process comprises coating or microencapsulating the particle core by a method selected from a group consisting of chemical processes such as calcination, microwave hydrothermal processing, forced hydrolysis and precipitation, double jet technique, dispersion technique, sol-gel processing, vapor phase deposition, phase separation and solvent evaporation.
Dependencies are inferred from the claim text.