Patent ID: 8670174
Filing Date: 2014-03-11
Classification: G02F

Abstract:
1. A display device comprising a plurality of display cells, wherein each of said display cells is filled with an electrophoretic display fluid, which electrophoretic display fluid A. comprises (i) a white non-mobile or semi-mobile phase, (ii) a first type of charged pigment particles which are black, (iii) a second type of charged pigment particles which are colored and transparent or opaque, and (iv) a solvent or solvent mixture; wherein said non-mobile or semi-mobile phase and the two types of charged pigment particles are dispersed in the solvent or solvent mixture, and the two types of charged pigment particles are oppositely charged, and B is sandwiched between a common electrode which is on the viewing side and at least two pixel electrodes, whereby a black color is displayed when the first type of charged pigment particles is driven to the common electrode, a color of the colored and transparent or opaque charged pigment particles is displayed when the second type of charged pigment particles is driven to the common electrode, and a white color is displayed when the first and the second types of charged pigment particles are driven to separate pixel electrodes.