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US 7,800,813 B2Granted
Methods and compositions for improved electrophoretic display performance
AssigneeSiPix Imaging, Inc.
InventorsZarng-Arh George Wu, Xiaojia Wang, Xin Weng, Yajuan Chen, Rong-Chang Liang
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Abstract
The invention is directed to novel methods and compositions useful for improving the performance of electrophoretic displays. The methods comprise adding a high absorbance dye or pigment, or conductive particles, or a conductive filler in the form of nanoparticles and having a volume resistivity of less than about 104 ohm cm, or a charge transport material into an electrode protecting layer of the display.
Claims20
A method for improving contrast ratio of an electrophoretic display, wherein said electrophoretic display comprises
- (i) display cells filled with an electrophoretic fluid comprising charged pigment particles dispersed in a solvent or solvent mixture,
- (ii) a sealing layer on the open side of each of said display cells,
- (iii) optionally a primer layer, and
- (iv) optionally an adhesive layer;
- which method comprises forming at least one of the sealing layer, the primer layer, and the adhesive layer by adding a high absorbance dye or pigment to said layer;
- wherein the formed electrophoretic display comprises at least one layer (ii-iv) containing said high absorbance dye or pigment.
3 more elements
Dependencies are inferred from the claim text.