Electrophoretic display device

An electrophoretic display device comprising:

• a plurality of pixel electrodes;
• a common electrode;
• and
• an electrophoretic ink layer comprising a plurality of cavities, each cavity being arranged between one of the pixel electrodes and the common electrode, and comprising a suspension fluid, a plurality of first type charged particles dispersed in the suspension fluid, and a plurality of second type charged particles dispersed in the suspension fluid;
• wherein, the first type charged particles and the second type charged particles have the same polarity of charge but substantially different electrophoretic mobilities;
• three cavities constitute a pixel unit, the first type charged particles and the second type charged particles in each pixel unit are one of red, green, and blue particles, and one of yellow, magenta, and cyan particles, respectively.

An electrophoretic display device comprising:

• a plurality of pixel electrodes;
• a common electrode;
• and
• an electrophoretic ink layer comprising a plurality of cavities, each cavity being arranged between one of the pixel electrodes and the common electrode, and comprising a suspension fluid, a plurality of first type charged particles dispersed in the suspension fluid, and a plurality of second type charged particles dispersed in the suspension fluid;
• wherein, three cavities constitutes a pixel unit, the first type charged particles and the second type charged particles in each pixel unit are one of red, green, and blue (RGB) particles, and one of yellow, magenta, and cyan (YMC) particles, respectively;
• at least one of the RGB particles have a charge polarity substantially the same as the charge polarity of the one of the YMC particles.