US Patent 7564186 Reflective display device with divided electrodes

Disclosed herein is a reflective display device. The reflective display device includes a first substrate and a second substrate, a first electrode group and a second electrode group, and electrically charged particles. The first substrate and the second substrate are located parallel to each other and configured to form a plurality of sub-pixel cavities. The first electrode group and the second electrode group are respectively formed on the first and second substrates, arranged to cross each other with the sub-pixel cavities interposed therebetween, and configured such that each electrode of one of the first and second electrode groups is divided into two or more line electrode patterns and the line electrode patterns extend through the corresponding sub-pixel cavities. The electrically charged particles are located in the corresponding sub-pixel cavities, and configured to move in response to variation in the polarity of voltage applied across the first and second electrodes.