Color display devices
AssigneeE Ink California, LLC
InventorsXiaojia Zhang, Craig Lin, Robert A. Sprague
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Abstract
The present invention is directed to a color display comprising an electrophoretic fluid comprising two types of pigment particles of contrasting colors and carrying opposite charge polarities dispersed in a clear and colorless solvent, wherein said electrophoretic fluid is sandwiched between a common electrode and a plurality of colored sub-pixel electrodes or colored pixel electrodes.
Claims2
A driving method for a color display comprising an electrophoretic fluid comprising two types of pigment particles carrying opposite charge polarities and having contrasting colors, wherein the particles are dispersed in a solvent, and said electrophoretic fluid is sandwiched between a common electrode and a plurality of colored sub-pixel or pixel electrodes, which method comprises
- a) applying a constant driving voltage between the common electrode and the sub-pixel or pixel electrode where the pigment particles are to be gathered;
- and
- b) applying alternating positive driving voltage and negative driving voltage between the common electrode and the sub-pixel or pixel electrode which is to be exposed.
Dependencies are inferred from the claim text.